This was an absolute life saver. I installed a new psu with the wrong cables and something happened to my ssd so that it couldn’t boot anymore. Just went straight to bios. I spent nearly 10 hours troubleshooting and testing components before I found this video. My boot files must have been corrupted somehow and this fixed them. Can’t thank you enough.
Thx for teaching an old dog a new trick. Usually when the /bootfix fails on me, I assume it's because the OS is just beyond repair. Now that I know it's because of 1703, that's a game changer for me! We can collab ANY time you want, brother! 👍💪
I wasn't aware of what was causing the problem ether until I did the research for this video. Many guides would mention the 1703 issue but were never clear on it. It wasn't until I tried it on a 1703 disk that it worked. The video almost didn't get made because of it.
Hello Rich, I can't tell ya how much I appreciate this awesome video. Early July of this year (2024) we had a lightning strike that took out 3 routers, 2 computers and a UPS. After almost 2 months of waiting on replacement parts (2 motherboards, new memory) I'm finally getting things up and running again. I haven't tried the repair solution you shared in this video, however it looks extremely promising and will actually work. Hopefully I wouldn't need direct help from you, if I did happen to need a little extra guidance would you be willing to answer my questions and assist me? Hopefully I can manage to hold my mouth right as I'm performing the steps you have shared in this video. In a brief explanation the system I am working on is mom's computer and it is a dual boot (Windows XP Pro 32 bit and Windows 10 Home 64 bit) there are 2 hard drives, each drive is a terabyte in size and each drive has 2 partitions split as closely as possible to 500 GB per partition on each drive. A recent discovery was the XP is on one of the drives and 10 on the other drive. I didn't intend to do that as I intended both OSs to be on one drive and the other drive would be exclusive for storage. Anyway I have a slight concern that the dual boot as described could cause the operation of repairing the BOOTMGR to fail. Anyway thanks for taking the time to read my post 😃😄.
@@CyberCPUHey there Mr Rich I'm not sure if you read my previous post, but I have an update. I have managed to get both OSs on one drive now on different partitions on a new 2 terabyte drive (the original drives will be kept for backups), anyway now it is as it should have been from the start (both OSs on the same drive). I'm going to go nuclear on the original BCD because Win 10 still refuses to boot it says "inaccessible boot device" at least now it shows this on the same hard drive where as before I had to have both of the original drives connected to have the "inaccessible boot device" message. Thank you in advance if you've taken the time to read this 2nd message.
I love this guy's tutorials man. I haven't used Windows in years as a daily driver and if I get such errors I'll simply revert to a clean snapshot for my VM, but this guy simply has the type of energy for a TH-camr that you want to watch his videos even if you'll never have to resolve such problems. (maybe handy to recommend for a friend though!)
If I had MILLION$ to give you, it would be yours!!!! Holy cats!! I was dead in the water and you resurrected me!! 🙂 I knew what the problem was...just had to figure out a way to resolve it. This video was PHENOMENAL!!! Luckily my Windows installation CD is pre 1703, so I didn't have to fight that issue. I did, however, have to side track a little off your video and find a fix for an "Element Not Found" error when running BOOTREC /FIXBOOT. But once that issue was resolved, everything launched with success exactly as you demonstrated in your video. Just friggin' YUUUUUUUGE KUDOS to you!!!!! Thank you ~
Using command "dir /a" helped tremendously and I was able to see directories and files that I could NOT before. I agree with someone who said that you are a GREAT teacher. Thanks for all you do for us. With warm regards
I love that, I've blown up so many linux installs... All at home, never production. After 30 years of starting over, I feel I've got in now. If you ever need assistance with Linux and FSTAB and mounting volumes from network resources right into the middle of you workspace ... I play hard and do weird things that can make a programmers life.... so easy....
The only (little) problem I had following your video is that BCD appeared to be read only and hidden. But after solving that: it worked, great man, thank you very much !
The access denied bit was driving me nuts. Appreciate the ver dependency information. There are tons of write-ups out there indicating that access denied issue is fixable via other commands, but it is not.
Thanks for posting all this. Even as a technical person, what this tells us is that windows is inordinately complex and for no good reason. My daughter's win 10 disk just gave up and fortunately before it died, I managed to clone it. So to avoid all this horrendous boot nightmare, that's what I recommend - buy another disk of the same size and clone your OS. Microsoft will probably say that's an infringement of the license agreement, but I play fair - the clone goes in my desk drawer until I need it. For those who might complain that this method requires the purchase of another disk, my answer, from my experience of Windows disk failures, is that you're going to need one to replace the failed drive, AND its much harder to reconfigure your new disk when the old one fails. Happy disk drives :) :)
I cannot emphasize how useful this video is. Thank you so much. This particular video will end up in my Watch later playlist, cause I'm gonna use it at some point in the future.
Man, I've watched both of those vids of yours (the other being fixing the UEFI partition mentioned in the beginning) and can I just say a massive thank you for how clear and helpful these tutorials were made. You really helped me out a lot as I was stuck on my new z790-a wifi 2 not wanting to either see the installed ssd's or later it was giving me massive issues with booting. For me nothing wanted to boot unless I did in manually in the bios. Simple restarting; once I got into windows was giving me the blue error recovery screen. I've spent at least 3 days frustrating over it but thanks to this vid and applying it to my problemsI think I've finally managed to get to a state where it boots, and restarts as intended. Windows is still in my case not on the drive I wanted as I installed windows onto an ssd and not a NvMe stick but at least I can move on to that minor problem, as the booting issues are gone. Thank you again! I think my problems were due to multiple partitions not communicating correctly together as the boot files were in different place to my windows files. Once I followed your steps, it helped.
You are a genius! I can not thank you enough for saving my drive. I will definitely make an image of my OS, Its such a relief to be back in my accounts and I want to send big love from germany. The 1703 build just magically did it. Insane.
Thank you for saving my life. I do something different way to save my Windows because i have slightly different case. *1.* I have 1 disk running Windows (labeled NVME1 {C:\}) and then i install another Windows on new disk (labeled NVME2 {F:\}). After that, everytime reboot Windows giving me 2 option boot : NVME1 and NVME2 *2.* I remove all partition on NVME1 and because i want to use it as data disk, but not boot disk. *3.* After step 2 i got boot error because system can't find booting disk. *Solution :* i follow some of your instruction 0. Plug my Windows 10 flashdisk (H:\) and boot it, choose repair my windows, choose command prompt 1. Go to boot disk {NVME2}, select vol, set *active* volume using Diskpart 2. Copy all files in directory */boot* in my _flashdisk_ to installation disk {NVME2} using copy command (copy H:\boot\*.* F:\) now after i have standard BCD file, i execute 3. F:\bootrec /rebuildbcd 4. F:\bootrec /fixmbr 5. F:\bootrec /fixboot 6. restart, and Windows will automate rebuild and check sistem after login
Interesting fix. In my case I have my windows installation on c drive, and on C I also have the bootmanager and boot on it. It also has the hidden volumes. One volumes is 100 MB, and other one is 499 MB. Smaller has in its directory EFI directory and system vol info and recycle bin. It should be the system reserve but it doesnt have any boot related files. Could your method work on my case?
Thank you so much for this info. Your delivery and content is clean and precise. Explanation of each command cuts down the wall of text I would had to read to truly understand what each command does. I want you to grow as big as other prominent TH-camrs because your solutions respect the viewer’s time. Take care.
I can't thank you enough, you saved me from so much trouble and from installing Windows again and everything comes with it. Thank you thank you so much.
Thanks so much for the video! In my case, I have a dual boot Windows 10/Linux Mint system. While trying to upgrade to Mint v22, GRUB got corrupted. I then removed Mint and GRUB, leaving only Windows 10. But that apparently messed up the MBR. I followed your instructions, but when I reached the bootrec /fixboot command, I got "Element Not Found" error. It turned out that my Windows boot partition wasn't active. So I used your last instruction (diskpart> active) to set it. After that, bootrec /fixboot completed successfully. Following the rest of your instructions, Windows was able to boot!
Thanx so much for this. I was stuck with a Boot error after trying a Linux Dual Boot, and then when Deleting the Linux Partition in Windows, as no longer wanting Linux, the PC would not Boot, and gave same error as you had shown. My HDD was MBR, and followed your guide step by step, and now Booting back into Windows. Awesome.
This was a lifesaver. In my case I had only one volume on C where windows was installed, no system reservation 50mb volume When trying the fixboot I'd get an "element not found" error. I tried everything and was ready to give up, then by the end of the video it occurred to me that maybe changing the primary to C and trying all the steps again something would change? Well, actually that did the trick and now I'm back on business. Thank you very much for this video, I appreciate it!
I love how calm you are :) what i actually saw on the screen didn't match, it actually said "failure when attempting to copy boot files", but there's nothing that can be done about it.
As the tech of the company, it’s always cool to keep up with the latest tactics to deal with surprising issues like this….(that rear their ugly heads when you least expect or want them) Thanks for this!
Wow, being a guy who has been using bootable floppy for windows 95 this was a wow effect to fix a MBR, and i have been formatting my windows drive like stupid once the system was not booting up. Thank you so very much. Really appreciated. You just got yourself another student. 🎉😅😊
Perfect. Looked around for the reasons why Win 11 was not seeing Secure Boot, and this video nailed it. After removing a 3rd partition, I was able to convert and complete the Win11 install. Thanks!
I just can't help myself: you're way better than Carey Holzman though he's older than you and it supposed to have much more experience than you! He's just waisting particularly our time by showing stupid tutorials rather by teaching his audience such needed issues! Well done to you once again! I do really appreciate you and all your work here on your channel!😊
Thank you. I've been banging my head trying to get Windows 10 to boot again for the past few weeks. I got sick of Windows 10 corrupting my media drives, tried to switch to Linux, but it refused to mount the drives until WIndows had marked them clean. Now I've finally got Widnows 10 running and ran chkdsk on all of them. Time for Linux install.
Thank you for the detailed but straight-forward video. Before, I just typed things, or recited; Now I know what things do lol. You saved my life! The best get out of trouble video ever.
Thanks so much! For some reason it never showed my boot files in the directory but I followed the sets to set the boot file and it worked. Now my PC boots, but the power off doesnt work right anymore, sends it to lock screen. I just hold shift and press shut down and that works fine. So again thanks!
Thank you, it was actually MBR2GPT that borked my system, the OEM probably had some funky partitions that the tool couldn't handle. I had to remove those and rebuild the MBR manually like you explained. Let's hope I can upgrade it at some point...
Thank you, this was very helpful. bootrec /fixboot is not giving access denied, and it looks like I'm doing the correct steps in the correct order, however, my Windows 10 Pro still won't boot. It gets past the bootmgr, brings up the blue Windows logo for a bit, then goes to a black screen with the circling dots and stays there. The hard drive light flashes now and then, but it just keeps a black screen. I also tried formatting the System Partition, and rebuilding it with these commands, with from version 1703. But it still won't boot. Have you any ideas of what could be causing this, and how to fix or at least diagnose it? Thank you.
Thank you, thank you!!! You just helped me fix my parents ancient laptop. Somehow the hidden boot drive switched to D. But I followed your instructions and luckily had an ancient Win7 boot cd, and it now boots up. Thanks so much!!!
A great guide but in my case I got dead CMOS battery on my laptop and so I could no longer boot my system with GPT and EFI without changing the default setting every time, so I decided to go back to MBR. For that you have to remove any partition that is related to boot and keep only Windows partition itself, then in diskpart creat par prim, format fs=ntfs, assign letter (whatever you like), active. Afterwards use the command "bootsect /nt60 your letter of choice: /mbr" and then "bcdboot D:\windows /s C:" as follows in this video guide. After that I did fixmbr and fixboot just in case, still haven't fixed the fact that scanos can't find any system but finally my system booted up just fine.
Thank you so much! This helped me a lot. I was always wondering why every time I tried to execute "bootrec /fixboot" it gave me the "Access denied" message when repairing customers' computers. I had to use different third party software to do it, just because almost every guide out there is outdated.
Thats is true,however i use a dedicated software for jobs like this 99% of the time because,heck they are much faster and easier than messing with the command line.
@@CyberCPU Lazesoft recovery suite(the paid version) is currently my favorite,also the rescatoux recovery(its a gui linux iso) and many others inside the "medicat usb" will fix most issues.Have a look at Medicat usb, and see if its worth making a video about it.
Mine was a bit different problem but this helped! Thank you! For anyone else who stumbles upon this My issue was that my system wouldnt take the win 10 bootable drive in either uefi or legacy mode For UEFI to work, it needs a fat32 bootable drive And latest Win 10 ISOs have files bigger than 4 gb But fat32 cant have files bigger than 4 gb thus rufus would force the drive into ntfs format thus stopping a UEFI boot Win 10 1703 works because the biggest file in it "install.wim" is smaller than 4 gb therefore it can have the fat32 format thus it can boot in UEFI mode Im not really sure what stopped me booting it in mbr legacy mode tho
Omfg dude is a full ass lifesaver! Heads up I followed the steps including the one that gives "Access denied" (still gives access denied but I was out of options) on W10 19045 and it works!!!! My scenario, I have a legacy boot SSD I upgraded my PC and the motherboard/CPU refused to boot into windows and I had no way of upgrading the install from MBR to GPT for UEFI. This video saved me a lot of heartache of having to install windows on a clean drive and copying over shit tons from a husband/wife shared PC.
I tried this anyway using a Win 10 v1903 install drive I had and it worked. However, I only had to do the first command in the set and it booted. Guess my boot files werent that corrupt 🙌🙌 Thank you so much man, subbed!
Amazing. I learned computers after DOS so all this stuff is fairly new to me but I did not want to reinstall windows again. I'm having issues with my oc lately and long story short I reinstalled windows in a new SSD and at boot up I have to always select which disk to use. Yesterday tried deleting the old drive and that's it...I could not get back in for the life of me. I followed your instructions and was able to fix the disk and get in. Thanks.
Rich you are a master, watched both videos related to fixing boot issues. Please make the one you have mentioned RE dual/multiboot. Perhaps I can prompt the content, W10 + W11 + Ubuntu. Thank you.
Thanks Rich! I was about to give up on trying to restore an HP Compaq Pro 6305 Small Form Factor using a "repair cd" when I came across this video. Even though I didn't fully understand the logic of all the commands, I did what your said to do here, brought it back, and it boots up fine now. I am not savvy on how to "Run an older ISO," but when you instructed us to put c:>bootrec /scanos it said "Total Identified Windows Installations:0" YOU then pointed out the BCD file at the top of the list. Well my list didn't have a BCD file there but I just continued following your instructions as if it did, and renamed BCD (a file NOT ON THE LIST, and I didn't delete/break it as you did "on purpose for your video"): But I did this rename anyway expecting it to fail since I was renaming something not there... I entered: c:\Boot>ren BCD BCD.bk and got no error message, but unfortunately, I didn't check to see if BCD or BCD.BK was there now or not. I did the c:>bootrec /fixmbr and it said "Completed successfully." When I did c:\>bootrec /fixboot, it said "Access Denied" like you said it might I just followed you and continued rebuilding the BCD. Even though I had these different things happen during this process, bottom line the PC is running great, so it must have rebuilt all it needed! I was in telecom for many years and have never seen such tremendous support as you have given here...Extremely Impressed Thx again...
Great video yet again, the 1703 ver thing I didn't know about but I do remember thinking why did all the cmds work before on older win 10 installs but not anymore? Now we know about 1703 ver isos and older disks! I thought I was losing my touch.😂
This made me dig out my PACK RAT binder of PC discs, and VOILA, I actually have a Windows 10 version 1511 ISO, 64 bit. But the next oldest one was 1809, so I realize now, why I pack rat these discs. Thanks !!
When I do format fs=fat32, I get an error for the drive being on read only. Then when I try to remove the read-only, I getan error of CRC. Does this mean the drive is dead?
Hey...great tutorials. But I have another problem that you haven't addressed. I have a Win10 install that doesn't have any other partitions other than the main windows. In other words, there is no boot partition or recovery partition on it. How can I fix it so it will boot? Thank you.
@@hunter7777 I meant a comment to this video. It starts 'Out of Date'. Search and you'll find it. It maybe a bit too quick for some. Perhaps I'll do a real video on Boot repair on mbr.
@CyberCPU Tech This video saved a huge amount of my medical academic data which became inaccessible. Thanks a lot to you. I absolutely love the way you explain things. Especially explaining the possible reasons for the hiccups one may face when trying to repair their system. I also appreciate the way you explain things step by step with visuals to go alongside the narration. Keep up the good work bro. Such things always help in a crunch when immediate professional help cannot be available. The issue you highlighted regarding bootrec not being available in newer versions of windows got me thinking a bit. Are there more such tools or applications which have been deprecated by the original publishers? Especially ones which become essential in such scenarios. If yes, it would be extremely helpful, I believe, to compile a list of such tools and the ISO versions which would be required to access them. As a layman with just some working knowledge of tinkering systems to get my desktop up and running, a person like me would definitely appreciate knowing which ISOs should always be at hand. Storage space (both physical and digital) is at a relative premium for me and I would rather keep a few essential ISOs saved on my disks rather than all available ISOs as an IT repair professional might. I guess I am effectively requesting you to make a video listing out such applications and tools and which ISOs are these available in. Thanks a lot again. I wish you even more success and hope that you continue educating us.
Yes!Yes!Yes! It worked! Haha! What happened in my case is my PC was doing a system update and the mbr failed. I had tried three other TH-cam tutorials with no luck. I did, however, have a newer USB installation file, and I had to make a couple of skips, but it worked. Now, you should make a video on exactly what to do after recovering from a catastrophic scenario to lessen the chances of it happening again.
The selection of the reserve partition not as easy and presented, mine is gand once I try to select it like that it says not recognised both internal and external command
I had a new m.2 gen 5 that i installed win 11 on. My old drive still had windows installed. The new drive was 1tb the old drive was 2 tb, so it's idiot proof what drive needed formatted. I used windows installation to access the hidden partitions and erased all of them for disk 1, disk 0 was my new disk and all partitions un touched. I restarted and no bootible media found. How does formatting one drive effect a completely separate drive????
Here is the thing: on 16:41 minute it shows that return figure "1", but to me it returned "0", and even so, I continued your indications further more to the end and interestingly enough I still was able to boot again my laptop in Windows 10! Strange or what?! However since I've got Windows 10 on "C" partition and Win XP on other partition - though it should've been on "C" one since the right order of installation should be first Windows XP, necessarily on "C" drive and then any OS(Win 7, Win 10, Win 11 etc) on any other partition - can you please guide me how would I be able to or what and how should I do to see both operating systems and so to be able to choose which one to start with/to booth with?! So far I just can't see that menu to choose from either Win 10 or Win XP and it's booting default in Win 10. Kindly awaiting for your professional reply.
Hey there. Facing an issue w/ my pc I bought a few months back. Randomly began having a booting issue after not being able to detect my WiFi adapter. I switched over to a WiFi cable hoping it’d fix the problem and in fact made it worse. My pc will no longer boot up. I’m getting error message CRITCAL PROCESSED DIED. I went through a series of TH-cam videos and I finally came upon your page. PLEASE help if you can I’m getting gray hairs. 😭
Hi Rich, unfortunately when running the command bootrec /rebuildbcd, I press Y, and the return line is “The requested system device cannot be found.” I am going to lose my mind!!!! Please let me know if you have a fix for this.
Hope you see this message sir, I damaged my laptop with a windows 8 iso, so must use a windows 8 iso( same windows 8 iso) or can I use any iso, like windows 10 iso
dont suppose there is a chance we could have a copy of your ventoy usb, so we can download as an image, or even an upto date video on how to make. ? ive seen the old video but had no luck getting my ventoy usb to work properly. ?
After you broken the MBR, the option "Continue to Windows 10" has disappeared from the Recovery menu leaving only Troubleshoot and Turn Off. And it returned once you fixed it 😅 so simply to find out, it won't boot again (once you broken it)
Thank you. I should have followed your instructions here (for broken MBR) but I followed the ones given for broken UEFI, first. In the process, I discovered that my partition is MBR, as when I tried to install Windows ... I got an error saying - "Windows cannot be installed to this disk, as it has a MBR partition table On EFI systems Windows can only be installed on GPT disks" So a natural question - how should I have determined what I needed beforehand.
I get access denied and i am using an older version of w10, i do not have a bcd file. I see windows in my dir. but it is never found when attempting to rebuild bcd.
Hi.. I tried the last bcd config you did and it still shows the same result. The problem with the booting started when I created a partition on my C:. Since then my pc won't boot and i can't loose it's files. Pls help me
Hey I'm using windows 11 and after a quality update my laptop goes bsod and sends me to aptio. I found the update at the cmd in recovery mode but the update that is causing trouble isn't uninstalling, it keeps showing error but when i uninstalled the other update that was installed at that date too, it uninstalled successfully so yeah i found the culprit. How can i uninstall that quality update? (I've tried every other methods that's why I'm forced to use cmd in recovery mode)
Or here's another scenario your computer gets hacked the hacker finds your MBR file and deletes it! And if that happens when you log off your computer and when you go to log back in your computer you will either be directed to your bios or your windows advanced settings menu. At that point it's a total shit show from there but it will definitely build up your knowledge and education within computing and IT.
@@vampg4ze Yes! Its called hence the name "LOGO-FAIL" Malware. It attachés malware straight into your "BIOS FOLDER" so when you start up your computer you get hit right away. simply because the first folder picked up on start up is your "BIOS DIR /FOLDER" And your "LOGO-FOLDER" -(How to fix the issue .") #1-("If you have a windows restore point folder created you go in advanced settings and go into "RECOVERY FOLDER" and RESTORE POINT and if their is a restore folder it will pop up and you select the folder and restore it from that restore point. #2-(" Try windows repair and run the windows repair and if you get a ERROR message try it aging sometimes it takes 2 or 3 times but if it exceeds over 3 times your computer is a litter bit more corrupt then you think it is and then that will bring you to step number three! #3-(Your computer has a serious malware problem and now the only way to 100% fix it at this point will be to INSTALL A NEW "OS SYSTEM" BECOUSE ONE OF YOUR 3 MILLION LINES OF CODING THATS IN ANY AVERAGE OS SYSTEM IS MISSING OR CORRUPTED EITHER WAY YOU LOOK AT THE SENIREO YOUR IN A BAD SPOT AND HOPEFULLY YOU DID A SECONDARY BACK UP OF YOUR (note) - The number of lines of code in an average operating system (OS) can vary significantly based on its complexity and the specific OS in question. Let’s explore some examples: 1-Windows 10: The fundamental components of Windows 10, including memory and processor administration, are managed by the Windows 10 kernel. The kernel of Windows 10 is estimated to consist of approximately 3 million lines of code1. This includes both code developed by Microsoft and code contributed by external developers. 2-Mac OS X (Apple’s operating system): Mac OS X contains an impressive 86 million lines of code2. Most of these lines are programmed in C and assembler, which are less tidy but more efficient languages. -(Other notable examples ARE) 3-Google Chrome (browser) runs on approximately 6.7 million lines of code (upper estimate)3. 4-The Android operating system runs on 12-15 million lines3. The Large Hadron Collider (LHC) uses 50 million lines3. 5-Facebook’s codebase (excluding backend code) Comprises 62 million lines3. -Now Remember, a million lines of code, if printed, would span about 18,000 pages of text, which is more than what was needed to run old technologies like the Space Shuttle or even the game engine of Quake - However, modern software used in everyday life today often requires much more code to function effectively. 🖥💻 Keep in mind that these numbers represent the complexity and scale of different systems, and the actual lines of code can vary based on specific implementations and optimizations. -Now lets dive in to how all of this happens in the first Let’s delve into the intriguing world of cybersecurity and explore the notorious vulnerabilities you’ve mentioned: LogoFAIL, EternalBlue, Blue Latern, and Pegasus malware. -1. EternalBlue: The Windows Catastrophe EternalBlue is a software vulnerability that shook the digital landscape. Here’s what you need to know: Origin: Discovered by the United States National Security Agency (NSA), it was part of their secret toolkit. Target: EternalBlue exploits the Windows Server Message Block (SMB) protocol, which facilitates shared access to files, printers, and resources within a network. Exploit Mechanism: By manipulating specially crafted packets, an attacker can execute arbitrary code on a vulnerable Windows system. DoublePulsar: EternalBlue’s sinister companion, DoublePulsar, acts as a backdoor implant tool. Once EternalBlue opens the door, DoublePulsar injects and runs malicious code on the target system. Lack of Segmentation: The flaw allows lateral movement within a network, enabling malware to spread from one system to another. Why Was It So Critical? Windows Popularity: With Windows being ubiquitous, the vulnerability put countless systems at risk. Patch Challenges: Despite Microsoft releasing patches, many organizations lagged in implementing them or used unsupported Windows versions. Weaponized Nature: Originally designed for espionage, EternalBlue’s sophistication made it a potent tool. -2. LogoFAIL: Stealthy Exploitation LogoFAIL takes a different route: Bypassing Security Measures: This exploit cunningly evades hardware and software security solutions implemented by CPUs, operating systems, and third-party security software. Nearly Impossible to Detect or Remove: Unlike flashy attacks, LogoFAIL operates silently, making it a nightmare for defenders. 3. Blue Latern: A Mysterious Mention Unfortunately, I couldn’t find specific details about Blue Latern. It seems to be elusive, lurking in the shadows of the cyber realm. If you have more context, feel free to share! -4. Pegasus: The Spyware of Nightmares Pegasus is a notorious spyware developed by the Israeli firm NSO Group. Here’s its dark tale: Capabilities: Pegasus infiltrates smartphones, gaining access to calls, messages, emails, and even activating the camera and microphone. Targets: Governments and intelligence agencies deploy Pegasus for surveillance, often against journalists, activists, and dissidents. Zero-Click Attacks: Pegasus can infect devices without any user interaction-simply receiving a malicious message triggers the exploit. In summary, these vulnerabilities and malware exemplify the perpetual cat-and-mouse game between cybersecurity experts and threat actors. As technology evolves, so do the risks. Vigilance, timely patching, and robust defenses remain our best allies in this digital battleground. 1: EternalBlue Explained - An In-Depth Analysis of the Notorious Windows Flaw 2: LogoFAIL exploit bypasses hardware and software security measures 3: Putting the Eternal in EternalBlue: Mapping the Use of the Infamous Exploit
I honestly think that this is the issue that I have with my laptop rn. I downloaded an ai software for statistics and deleted it since it's really useless then this circus happened
Wow , have been working with all this for years and somehow got everything fixed but never knew all the dissections , reasons etc . But now that I know theory of everything feels so much better . Dying with questions in mind is never good😂. But u made so many things about boot etc especially 1703 concept is game changer. Just an addition is that sometimes the reserve folder hidden has not been assigned a letter in that case we need to assign a letter too, hope it helps someone needy hovering over comments😂. And will have to waste a pendrive bootable for 1703.😂
Holy Smokes ! ISO Version 1703 was released in 2017 ! Not many folks have access to that version. MS Support doesn't offer it either. I'll need to check through my CD Library. However is there another way to get around the Access Denied error ?
I found my clone drive didn't have no boot dir at all. after I did get them on it still won't start. It takes me back to repair screen. Wonder why it won't load/?
good evening, I have a problem, my Win 11 no longer works. Can you help me? I think my boot loader is gone, but my Win 11 folder is still there. Can you please help me with my problem? thanks in advance
Hi Thanks for sharing your valuable knowledge with us all! I believe my reg files were corrupted after an update on my 2013 win10 upgraded Samsung NP350 laptop. For some reason the only thing I can access is the bios where I can modify the boot device to a usb but the win10 installations won’t even go past the window logo and a little turning wheel. So no startup repair or recovery or cmd option. The screen is turned on but blank. No specific noise from the hdd. What could someone recommend? (There was of course no installation cd with the laptop upon purchase and there’s no media installation download on the Samsung support. I am about to go nuts!
I get a blue screen after trying to install some Audio software... Would this help to recovery the system? Thanks, I tried all the standard options by the way and using a windows repair was not working for me.
Hi! I installed fresh Windows 10 Home version 19045 but I face 4-5 reboots till normal start . If this procedure followed will not work , could be a faulty bios and need to be updated ? Thank you!
I've tried this several times but still unable to restore the boot sector, so let me try this a different way, Can i convert the drive to uefi then fix the boot so I can keep the system? I would eventually like to try adding windows 11 in a new partition but I really want to fix the computer first without having to try restoring al my preferences.
all i did was accidentally reset my pc when it had an update installing.. i was working on something and i realized i didnt have a usb port plugged in that i needed, i reached around my computer to plug it in and when i did i had accidentally hit the power button on the tower. the screen went black and so i instinctively hit the power button to turn it back on and when i did i noticed that my computer had started an update and was at 2% already by the time i reached over to hit the button again. i got a bad pool caller error code, someone suggested i update my bios which i did and no i have an inaccessible boot device error and my command prompt WILL NOT register that i even have a valid windows 10 key. all this over accidentally hitting a damn button? is there anything i can do to fix this? i have a flash drive with a windows 10 boot on it but my problem PC will not accept it, all it says is that the computer cannot repair or accept the boot file.
This was an absolute life saver. I installed a new psu with the wrong cables and something happened to my ssd so that it couldn’t boot anymore. Just went straight to bios. I spent nearly 10 hours troubleshooting and testing components before I found this video. My boot files must have been corrupted somehow and this fixed them. Can’t thank you enough.
You were lucky your SSD only had issues...
Thx for teaching an old dog a new trick. Usually when the /bootfix fails on me, I assume it's because the OS is just beyond repair. Now that I know it's because of 1703, that's a game changer for me! We can collab ANY time you want, brother! 👍💪
I wasn't aware of what was causing the problem ether until I did the research for this video. Many guides would mention the 1703 issue but were never clear on it. It wasn't until I tried it on a 1703 disk that it worked. The video almost didn't get made because of it.
Hello Rich, I can't tell ya how much I appreciate this awesome video. Early July of this year (2024) we had a lightning strike that took out 3 routers, 2 computers and a UPS. After almost 2 months of waiting on replacement parts (2 motherboards, new memory) I'm finally getting things up and running again.
I haven't tried the repair solution you shared in this video, however it looks extremely promising and will actually work.
Hopefully I wouldn't need direct help from you, if I did happen to need a little extra guidance would you be willing to answer my questions and assist me?
Hopefully I can manage to hold my mouth right as I'm performing the steps you have shared in this video. In a brief explanation the system I am working on is mom's computer and it is a dual boot (Windows XP Pro 32 bit and Windows 10 Home 64 bit) there are 2 hard drives, each drive is a terabyte in size and each drive has 2 partitions split as closely as possible to 500 GB per partition on each drive. A recent discovery was the XP is on one of the drives and 10 on the other drive.
I didn't intend to do that as I intended both OSs to be on one drive and the other drive would be exclusive for storage.
Anyway I have a slight concern that the dual boot as described could cause the operation of repairing the BOOTMGR to fail. Anyway thanks for taking the time to read my post 😃😄.
@@CyberCPUHey there Mr Rich I'm not sure if you read my previous post, but I have an update.
I have managed to get both OSs on one drive now on different partitions on a new 2 terabyte drive (the original drives will be kept for backups), anyway now it is as it should have been from the start (both OSs on the same drive). I'm going to go nuclear on the original BCD because Win 10 still refuses to boot it says "inaccessible boot device" at least now it shows this on the same hard drive where as before I had to have both of the original drives connected to have the "inaccessible boot device" message. Thank you in advance if you've taken the time to read this 2nd message.
I love this guy's tutorials man. I haven't used Windows in years as a daily driver and if I get such errors I'll simply revert to a clean snapshot for my VM, but this guy simply has the type of energy for a TH-camr that you want to watch his videos even if you'll never have to resolve such problems.
(maybe handy to recommend for a friend though!)
If I had MILLION$ to give you, it would be yours!!!! Holy cats!! I was dead in the water and you resurrected me!! 🙂 I knew what the problem was...just had to figure out a way to resolve it. This video was PHENOMENAL!!! Luckily my Windows installation CD is pre 1703, so I didn't have to fight that issue. I did, however, have to side track a little off your video and find a fix for an "Element Not Found" error when running BOOTREC /FIXBOOT. But once that issue was resolved, everything launched with success exactly as you demonstrated in your video. Just friggin' YUUUUUUUGE KUDOS to you!!!!! Thank you ~
Glad it helped.
same. Had to mark the partition as active and it worked.
Using command "dir /a" helped tremendously and I was able to see directories and files that I could NOT before. I agree with someone who said that you are a GREAT teacher. Thanks for all you do for us. With warm regards
I messed up a Linux installation on a drive that I didn't know was MBR. This saved my windows installation, thanks.
I love that, I've blown up so many linux installs... All at home, never production. After 30 years of starting over, I feel I've got in now. If you ever need assistance with Linux and FSTAB and mounting volumes from network resources right into the middle of you workspace ... I play hard and do weird things that can make a programmers life.... so easy....
The only (little) problem I had following your video is that BCD appeared to be read only and hidden. But after solving that: it worked, great man, thank you very much !
How to solve read only and hidden BCD
@@TiaguinhoMu by means of the attrib command
Great tutorial. There's a bunch of half-ass Windows help channels on TH-cam, but this is not one of them.
The access denied bit was driving me nuts. Appreciate the ver dependency information. There are tons of write-ups out there indicating that access denied issue is fixable via other commands, but it is not.
This thing is horrible and about to reinstall. I’ve been at it all weekend. I’m frigging tired
@@whoisradu I'm at it right now... It's CRAZINESS!!
@@XWolf0f0dinXdid you find a fix ?
Thanks for posting all this. Even as a technical person, what this tells us is that windows is inordinately complex and for no good reason. My daughter's win 10 disk just gave up and fortunately before it died, I managed to clone it. So to avoid all this horrendous boot nightmare, that's what I recommend - buy another disk of the same size and clone your OS. Microsoft will probably say that's an infringement of the license agreement, but I play fair - the clone goes in my desk drawer until I need it. For those who might complain that this method requires the purchase of another disk, my answer, from my experience of Windows disk failures, is that you're going to need one to replace the failed drive, AND its much harder to reconfigure your new disk when the old one fails. Happy disk drives :) :)
I cannot emphasize how useful this video is. Thank you so much.
This particular video will end up in my Watch later playlist, cause I'm gonna use it at some point in the future.
Man, I've watched both of those vids of yours (the other being fixing the UEFI partition mentioned in the beginning) and can I just say a massive thank you for how clear and helpful these tutorials were made. You really helped me out a lot as I was stuck on my new z790-a wifi 2 not wanting to either see the installed ssd's or later it was giving me massive issues with booting. For me nothing wanted to boot unless I did in manually in the bios. Simple restarting; once I got into windows was giving me the blue error recovery screen. I've spent at least 3 days frustrating over it but thanks to this vid and applying it to my problemsI think I've finally managed to get to a state where it boots, and restarts as intended. Windows is still in my case not on the drive I wanted as I installed windows onto an ssd and not a NvMe stick but at least I can move on to that minor problem, as the booting issues are gone. Thank you again!
I think my problems were due to multiple partitions not communicating correctly together as the boot files were in different place to my windows files. Once I followed your steps, it helped.
You are a genius! I can not thank you enough for saving my drive. I will definitely make an image of my OS,
Its such a relief to be back in my accounts and I want to send big love from germany.
The 1703 build just magically did it. Insane.
Thanks!
You're welcome, and thank you.
Thank you for saving my life. I do something different way to save my Windows because i have slightly different case.
*1.* I have 1 disk running Windows (labeled NVME1 {C:\}) and then i install another Windows on new disk (labeled NVME2 {F:\}). After that, everytime reboot Windows giving me 2 option boot : NVME1 and NVME2
*2.* I remove all partition on NVME1 and because i want to use it as data disk, but not boot disk.
*3.* After step 2 i got boot error because system can't find booting disk.
*Solution :* i follow some of your instruction
0. Plug my Windows 10 flashdisk (H:\) and boot it, choose repair my windows, choose command prompt
1. Go to boot disk {NVME2}, select vol, set *active* volume using Diskpart
2. Copy all files in directory */boot* in my _flashdisk_ to installation disk {NVME2} using copy command (copy H:\boot\*.* F:\)
now after i have standard BCD file, i execute
3. F:\bootrec /rebuildbcd
4. F:\bootrec /fixmbr
5. F:\bootrec /fixboot
6. restart, and Windows will automate rebuild and check sistem after login
Interesting fix. In my case I have my windows installation on c drive, and on C I also have the bootmanager and boot on it. It also has the hidden volumes. One volumes is 100 MB, and other one is 499 MB. Smaller has in its directory EFI directory and system vol info and recycle bin. It should be the system reserve but it doesnt have any boot related files. Could your method work on my case?
Thank you so much for this info. Your delivery and content is clean and precise. Explanation of each command cuts down the wall of text I would had to read to truly understand what each command does.
I want you to grow as big as other prominent TH-camrs because your solutions respect the viewer’s time. Take care.
I can't thank you enough, you saved me from so much trouble and from installing Windows again and everything comes with it. Thank you thank you so much.
Thanks so much for the video! In my case, I have a dual boot Windows 10/Linux Mint system. While trying to upgrade to Mint v22, GRUB got corrupted. I then removed Mint and GRUB, leaving only Windows 10. But that apparently messed up the MBR. I followed your instructions, but when I reached the bootrec /fixboot command, I got "Element Not Found" error. It turned out that my Windows boot partition wasn't active. So I used your last instruction (diskpart> active) to set it. After that, bootrec /fixboot completed successfully. Following the rest of your instructions, Windows was able to boot!
Will try it tomorrow, thanks for your input
you are a saver. The way you cover all the 'what if' is very essential. Thank you
Thanx so much for this. I was stuck with a Boot error after trying a Linux Dual Boot, and then when Deleting the Linux Partition in Windows, as no longer wanting Linux, the PC would not Boot, and gave same error as you had shown. My HDD was MBR, and followed your guide step by step, and now Booting back into Windows. Awesome.
This was a lifesaver.
In my case I had only one volume on C where windows was installed, no system reservation 50mb volume
When trying the fixboot I'd get an "element not found" error.
I tried everything and was ready to give up, then by the end of the video it occurred to me that maybe changing the primary to C and trying all the steps again something would change?
Well, actually that did the trick and now I'm back on business.
Thank you very much for this video, I appreciate it!
I love how calm you are :) what i actually saw on the screen didn't match, it actually said "failure when attempting to copy boot files", but there's nothing that can be done about it.
same😭
Thanks for making this video, was able to save my daughters laptop she uses for collage. And made me her hero.
As the tech of the company, it’s always cool to keep up with the latest tactics to deal with surprising issues like this….(that rear their ugly heads when you least expect or want them)
Thanks for this!
Glad it helped.
Wow, being a guy who has been using bootable floppy for windows 95 this was a wow effect to fix a MBR, and i have been formatting my windows drive like stupid once the system was not booting up. Thank you so very much. Really appreciated. You just got yourself another student. 🎉😅😊
Perfect. Looked around for the reasons why Win 11 was not seeing Secure Boot, and this video nailed it. After removing a 3rd partition, I was able to convert and complete the Win11 install. Thanks!
I just can't help myself: you're way better than Carey Holzman though he's older than you and it supposed to have much more experience than you! He's just waisting particularly our time by showing stupid tutorials rather by teaching his audience such needed issues! Well done to you once again! I do really appreciate you and all your work here on your channel!😊
10:42 how do I boot into recovery mbr?
Thank you. I've been banging my head trying to get Windows 10 to boot again for the past few weeks. I got sick of Windows 10 corrupting my media drives, tried to switch to Linux, but it refused to mount the drives until WIndows had marked them clean.
Now I've finally got Widnows 10 running and ran chkdsk on all of them. Time for Linux install.
Thank you for the detailed but straight-forward video.
Before, I just typed things, or recited; Now I know what things do lol.
You saved my life! The best get out of trouble video ever.
Thanks so much! For some reason it never showed my boot files in the directory but I followed the sets to set the boot file and it worked. Now my PC boots, but the power off doesnt work right anymore, sends it to lock screen. I just hold shift and press shut down and that works fine. So again thanks!
Thank you, it was actually MBR2GPT that borked my system, the OEM probably had some funky partitions that the tool couldn't handle.
I had to remove those and rebuild the MBR manually like you explained.
Let's hope I can upgrade it at some point...
Thank you, this was very helpful. bootrec /fixboot is not giving access denied, and it looks like I'm doing the correct steps in the correct order, however, my Windows 10 Pro still won't boot. It gets past the bootmgr, brings up the blue Windows logo for a bit, then goes to a black screen with the circling dots and stays there. The hard drive light flashes now and then, but it just keeps a black screen. I also tried formatting the System Partition, and rebuilding it with these commands, with from version 1703. But it still won't boot.
Have you any ideas of what could be causing this, and how to fix or at least diagnose it?
Thank you.
Thank you, thank you!!! You just helped me fix my parents ancient laptop. Somehow the hidden boot drive switched to D. But I followed your instructions and luckily had an ancient Win7 boot cd, and it now boots up. Thanks so much!!!
A great guide but in my case I got dead CMOS battery on my laptop and so I could no longer boot my system with GPT and EFI without changing the default setting every time, so I decided to go back to MBR. For that you have to remove any partition that is related to boot and keep only Windows partition itself, then in diskpart creat par prim, format fs=ntfs, assign letter (whatever you like), active. Afterwards use the command "bootsect /nt60 your letter of choice: /mbr" and then "bcdboot D:\windows /s C:" as follows in this video guide. After that I did fixmbr and fixboot just in case, still haven't fixed the fact that scanos can't find any system but finally my system booted up just fine.
Thank you brother, my system had a problem, with this video of yours, my problem was solved, I am from Iran, thank you for everything
Thank you so much! This helped me a lot. I was always wondering why every time I tried to execute "bootrec /fixboot" it gave me the "Access denied" message when repairing customers' computers. I had to use different third party software to do it, just because almost every guide out there is outdated.
I've had this issue for a long time too. I wasn't aware of the problem until I did the research for this video.
Thats is true,however i use a dedicated software for jobs like this 99% of the time because,heck they are much faster and easier than messing with the command line.
@@dimitrismaster what software do you use?
@@CyberCPU Lazesoft recovery suite(the paid version) is currently my favorite,also the rescatoux recovery(its a gui linux iso) and many others inside the "medicat usb" will fix most issues.Have a look at Medicat usb, and see if its worth making a video about it.
Mine was a bit different problem but this helped!
Thank you!
For anyone else who stumbles upon this
My issue was that my system wouldnt take the win 10 bootable drive in either uefi or legacy mode
For UEFI to work, it needs a fat32 bootable drive
And latest Win 10 ISOs have files bigger than 4 gb
But fat32 cant have files bigger than 4 gb
thus rufus would force the drive into ntfs format
thus stopping a UEFI boot
Win 10 1703 works because the biggest file in it "install.wim" is smaller than 4 gb
therefore it can have the fat32 format
thus it can boot in UEFI mode
Im not really sure what stopped me booting it in mbr legacy mode tho
No info on whether my windows drive is MBR or UEFI. How would I know? FROM the bios or cmd prompt.
Oooooh you are an absolute lifesaver my friend!!! I’ve just followed all of this for a borked windows 11 and it’s just let me back in! THANK YOU!!!
Omfg dude is a full ass lifesaver! Heads up I followed the steps including the one that gives "Access denied" (still gives access denied but I was out of options) on W10 19045 and it works!!!!
My scenario, I have a legacy boot SSD I upgraded my PC and the motherboard/CPU refused to boot into windows and I had no way of upgrading the install from MBR to GPT for UEFI.
This video saved me a lot of heartache of having to install windows on a clean drive and copying over shit tons from a husband/wife shared PC.
I tried this anyway using a Win 10 v1903 install drive I had and it worked. However, I only had to do the first command in the set and it booted. Guess my boot files werent that corrupt 🙌🙌
Thank you so much man, subbed!
Amazing. I learned computers after DOS so all this stuff is fairly new to me but I did not want to reinstall windows again. I'm having issues with my oc lately and long story short I reinstalled windows in a new SSD and at boot up I have to always select which disk to use. Yesterday tried deleting the old drive and that's it...I could not get back in for the life of me. I followed your instructions and was able to fix the disk and get in. Thanks.
Thank you for the detailed explanation and steps to recover the MBR.
@cyberCPu : it is showing element not found in bootrec /fixboot
I thought my computer was completely borked when it wouldn't boot passed bios, but thankfully I found this and it booted up afterwards!
Rich you are a master, watched both videos related to fixing boot issues. Please make the one you have mentioned RE dual/multiboot. Perhaps I can prompt the content, W10 + W11 + Ubuntu. Thank you.
Thanks Rich! I was about to give up on trying to restore an HP Compaq Pro 6305 Small Form Factor using a "repair cd" when I came across this video. Even though I didn't fully understand the logic of all the commands, I did what your said to do here, brought it back, and it boots up fine now. I am not savvy on how to "Run an older ISO," but when you instructed us to put c:>bootrec /scanos it said "Total Identified Windows Installations:0" YOU then pointed out the BCD file at the top of the list. Well my list didn't have a BCD file there but I just continued following your instructions as if it did, and renamed BCD (a file NOT ON THE LIST, and I didn't delete/break it as you did "on purpose for your video"): But I did this rename anyway expecting it to fail since I was renaming something not there... I entered: c:\Boot>ren BCD BCD.bk and got no error message, but unfortunately, I didn't check to see if BCD or BCD.BK was there now or not. I did the c:>bootrec /fixmbr and it said "Completed successfully." When I did c:\>bootrec /fixboot, it said "Access Denied" like you said it might I just followed you and continued rebuilding the BCD. Even though I had these different things happen during this process, bottom line the PC is running great, so it must have rebuilt all it needed! I was in telecom for many years and have never seen such tremendous support as you have given here...Extremely Impressed Thx again...
Great video yet again, the 1703 ver thing I didn't know about but I do remember thinking why did all the cmds work before on older win 10 installs but not anymore? Now we know about 1703 ver isos and older disks! I thought I was losing my touch.😂
back to old dos prompt..love it!! took me back to my youth days (1995)
Fantabulous tutorial it saved my day
I had all the problems described on my computer!
What are examples of code can you give how to individually specify that i boot in the same partition. 14:16
This made me dig out my PACK RAT binder of PC discs, and VOILA, I actually have a Windows 10 version 1511 ISO, 64 bit. But the next oldest one was 1809, so I realize now, why I pack rat these discs. Thanks !!
How do you know if you need 1703 or newer to do MBR or UEFI to fix the drive. I am a green horn at some of the nomenclatures used.
When I do format fs=fat32, I get an error for the drive being on read only.
Then when I try to remove the read-only, I getan error of CRC.
Does this mean the drive is dead?
Hey...great tutorials. But I have another problem that you haven't addressed. I have a Win10 install that doesn't have any other partitions other than the main windows. In other words, there is no boot partition or recovery partition on it. How can I fix it so it will boot? Thank you.
Check my other posts here
@@armsby Where are your other posts? You didn't provide a link. Thank you.
@@hunter7777 I meant a comment to this video. It starts 'Out of Date'. Search and you'll find it.
It maybe a bit too quick for some. Perhaps I'll do a real video on Boot repair on mbr.
Question please, Win 7 works great but is becoming obsolete, what version would be best to update to?
Is there an update route?
Thanks in advance.
Thank you bro. This were incredibly helpful. Avoid me of reinstalling the OS and losing useful software license. Great work. Keep on !
@CyberCPU Tech
This video saved a huge amount of my medical academic data which became inaccessible. Thanks a lot to you.
I absolutely love the way you explain things. Especially explaining the possible reasons for the hiccups one may face when trying to repair their system. I also appreciate the way you explain things step by step with visuals to go alongside the narration. Keep up the good work bro. Such things always help in a crunch when immediate professional help cannot be available.
The issue you highlighted regarding bootrec not being available in newer versions of windows got me thinking a bit. Are there more such tools or applications which have been deprecated by the original publishers? Especially ones which become essential in such scenarios. If yes, it would be extremely helpful, I believe, to compile a list of such tools and the ISO versions which would be required to access them. As a layman with just some working knowledge of tinkering systems to get my desktop up and running, a person like me would definitely appreciate knowing which ISOs should always be at hand. Storage space (both physical and digital) is at a relative premium for me and I would rather keep a few essential ISOs saved on my disks rather than all available ISOs as an IT repair professional might.
I guess I am effectively requesting you to make a video listing out such applications and tools and which ISOs are these available in.
Thanks a lot again. I wish you even more success and hope that you continue educating us.
does it work if windows has startup repair loop?
Yes!Yes!Yes! It worked! Haha! What happened in my case is my PC was doing a system update and the mbr failed. I had tried three other TH-cam tutorials with no luck. I did, however, have a newer USB installation file, and I had to make a couple of skips, but it worked. Now, you should make a video on exactly what to do after recovering from a catastrophic scenario to lessen the chances of it happening again.
The selection of the reserve partition not as easy and presented, mine is gand once I try to select it like that it says not recognised both internal and external command
Everything worked until I did the bootrec /rebuildbcd and then after hitting y it returned "the requested system device cannot be found"
Well done, but it would be helpful if you provided the link when you refer to a previous video.
I had a new m.2 gen 5 that i installed win 11 on. My old drive still had windows installed. The new drive was 1tb the old drive was 2 tb, so it's idiot proof what drive needed formatted.
I used windows installation to access the hidden partitions and erased all of them for disk 1, disk 0 was my new disk and all partitions un touched. I restarted and no bootible media found. How does formatting one drive effect a completely separate drive????
Here is the thing: on 16:41 minute it shows that return figure "1", but to me it returned "0", and even so, I continued your indications further more to the end and interestingly enough I still was able to boot again my laptop in Windows 10! Strange or what?! However since I've got Windows 10 on "C" partition and Win XP on other partition - though it should've been on "C" one since the right order of installation should be first Windows XP, necessarily on "C" drive and then any OS(Win 7, Win 10, Win 11 etc) on any other partition - can you please guide me how would I be able to or what and how should I do to see both operating systems and so to be able to choose which one to start with/to booth with?! So far I just can't see that menu to choose from either Win 10 or Win XP and it's booting default in Win 10. Kindly awaiting for your professional reply.
Hey there. Facing an issue w/ my pc I bought a few months back. Randomly began having a booting issue after not being able to detect my WiFi adapter. I switched over to a WiFi cable hoping it’d fix the problem and in fact made it worse. My pc will no longer boot up. I’m getting error message CRITCAL PROCESSED DIED. I went through a series of TH-cam videos and I finally came upon your page. PLEASE help if you can I’m getting gray hairs. 😭
Do an in place upgrade with the media creation tool, if you can boot to USB from your BIOS.
I tried doing this but I can't see any volume listed for my main ssd boot drive
Hi Rich, unfortunately when running the command bootrec /rebuildbcd, I press Y, and the return line is “The requested system device cannot be found.” I am going to lose my mind!!!! Please let me know if you have a fix for this.
this guide fixed my issue 100% . Recommended
Rebuild bcd didn't seem to be working for me. Nothing happens. Just shows the path "x:\sources>"
Hope you see this message sir, I damaged my laptop with a windows 8 iso, so must use a windows 8 iso( same windows 8 iso) or can I use any iso, like windows 10 iso
@@MuhammadShamsudeenSuleiman2467 use any Win 10 or above ISO. Follow my tut.
dont suppose there is a chance we could have a copy of your ventoy usb, so we can download as an image, or even an upto date video on how to make. ? ive seen the old video but had no luck getting my ventoy usb to work properly. ?
After you broken the MBR, the option "Continue to Windows 10" has disappeared from the Recovery menu leaving only Troubleshoot and Turn Off. And it returned once you fixed it 😅 so simply to find out, it won't boot again (once you broken it)
can you please advise what command or how to check an installed Windows version to see what ISO version it is more specifically a "Windows ISO 17.0.3"
in my windows 10 when i go to location setting it says some setting are managed by your organization
I’m having an issue where file explorer works normally but when I try to launch safe mode file explorer Errors
Thank you. I should have followed your instructions here (for broken MBR) but I followed the ones given for broken UEFI, first.
In the process, I discovered that my partition is MBR, as when I tried to install Windows ... I got an error saying - "Windows cannot be installed to this disk, as it has a MBR partition table On EFI systems Windows can only be installed on GPT disks"
So a natural question - how should I have determined what I needed beforehand.
I deleted bootmgr and I trying command and it doesn't copied of me. I'm reinstalling Windows
I get access denied and i am using an older version of w10, i do not have a bcd file. I see windows in my dir. but it is never found when attempting to rebuild bcd.
Hi.. I tried the last bcd config you did and it still shows the same result. The problem with the booting started when I created a partition on my C:. Since then my pc won't boot and i can't loose it's files. Pls help me
Hey I'm using windows 11 and after a quality update my laptop goes bsod and sends me to aptio. I found the update at the cmd in recovery mode but the update that is causing trouble isn't uninstalling, it keeps showing error but when i uninstalled the other update that was installed at that date too, it uninstalled successfully so yeah i found the culprit. How can i uninstall that quality update? (I've tried every other methods that's why I'm forced to use cmd in recovery mode)
Or here's another scenario your computer gets hacked the hacker finds your MBR file and deletes it! And if that happens when you log off your computer and when you go to log back in your computer you will either be directed to your bios or your windows advanced settings menu. At that point it's a total shit show from there but it will definitely build up your knowledge and education within computing and IT.
I literally think this exact thing happened to me, did this happen to you and if so how did you fix it?
@@vampg4ze Yes! Its called hence the name "LOGO-FAIL" Malware. It attachés malware straight into your "BIOS FOLDER" so when you start up your computer you get hit right away. simply because the first folder picked up on start up is your "BIOS DIR /FOLDER" And your "LOGO-FOLDER"
-(How to fix the issue .")
#1-("If you have a windows restore point folder created you go in advanced settings and go into "RECOVERY FOLDER" and RESTORE POINT and if their is a restore folder it will pop up and you select the folder and restore it from that restore point.
#2-(" Try windows repair and run the windows repair and if you get a ERROR message try it aging sometimes it takes 2 or 3 times but if it exceeds over 3 times your computer is a litter bit more corrupt then you think it is and then that will bring you to step number three!
#3-(Your computer has a serious malware problem and now the only way to 100% fix it at this point will be to INSTALL A NEW "OS SYSTEM" BECOUSE ONE OF YOUR 3 MILLION LINES OF CODING THATS IN ANY AVERAGE OS SYSTEM IS MISSING OR CORRUPTED EITHER WAY YOU LOOK AT THE SENIREO YOUR IN A BAD SPOT AND HOPEFULLY YOU DID A SECONDARY BACK UP OF YOUR
(note) - The number of lines of code in an average operating system (OS) can vary significantly based on its complexity and the specific OS in question. Let’s explore some examples:
1-Windows 10:
The fundamental components of Windows 10, including memory and processor administration, are managed by the Windows 10 kernel.
The kernel of Windows 10 is estimated to consist of approximately 3 million lines of code1.
This includes both code developed by Microsoft and code contributed by external developers.
2-Mac OS X (Apple’s operating system):
Mac OS X contains an impressive 86 million lines of code2.
Most of these lines are programmed in C and assembler, which are less tidy but more efficient languages.
-(Other notable examples ARE)
3-Google Chrome (browser) runs on approximately 6.7 million lines of code (upper estimate)3.
4-The Android operating system runs on 12-15 million lines3.
The Large Hadron Collider (LHC) uses 50 million lines3.
5-Facebook’s codebase (excluding backend code) Comprises 62 million lines3.
-Now Remember, a million lines of code, if printed, would span about 18,000 pages of text, which is more than what was needed to run old technologies like the Space Shuttle or even the game engine of Quake
- However, modern software used in everyday life today often requires much more code to function effectively. 🖥💻
Keep in mind that these numbers represent the complexity and scale of different systems, and the actual lines of code can vary based on specific implementations and optimizations.
-Now lets dive in to how all of this happens in the first Let’s delve into the intriguing world of cybersecurity and explore the notorious vulnerabilities you’ve mentioned: LogoFAIL, EternalBlue, Blue Latern, and Pegasus malware.
-1. EternalBlue: The Windows Catastrophe
EternalBlue is a software vulnerability that shook the digital landscape. Here’s what you need to know:
Origin: Discovered by the United States National Security Agency (NSA), it was part of their secret toolkit.
Target: EternalBlue exploits the Windows Server Message Block (SMB) protocol, which facilitates shared access to files, printers, and resources within a network.
Exploit Mechanism: By manipulating specially crafted packets, an attacker can execute arbitrary code on a vulnerable Windows system.
DoublePulsar: EternalBlue’s sinister companion, DoublePulsar, acts as a backdoor implant tool. Once EternalBlue opens the door, DoublePulsar injects and runs malicious code on the target system.
Lack of Segmentation: The flaw allows lateral movement within a network, enabling malware to spread from one system to another.
Why Was It So Critical?
Windows Popularity: With Windows being ubiquitous, the vulnerability put countless systems at risk.
Patch Challenges: Despite Microsoft releasing patches, many organizations lagged in implementing them or used unsupported Windows versions.
Weaponized Nature: Originally designed for espionage, EternalBlue’s sophistication made it a potent tool.
-2. LogoFAIL: Stealthy Exploitation
LogoFAIL takes a different route:
Bypassing Security Measures: This exploit cunningly evades hardware and software security solutions implemented by CPUs, operating systems, and third-party security software.
Nearly Impossible to Detect or Remove: Unlike flashy attacks, LogoFAIL operates silently, making it a nightmare for defenders.
3. Blue Latern: A Mysterious Mention
Unfortunately, I couldn’t find specific details about Blue Latern. It seems to be elusive, lurking in the shadows of the cyber realm. If you have more context, feel free to share!
-4. Pegasus: The Spyware of Nightmares
Pegasus is a notorious spyware developed by the Israeli firm NSO Group. Here’s its dark tale:
Capabilities: Pegasus infiltrates smartphones, gaining access to calls, messages, emails, and even activating the camera and microphone.
Targets: Governments and intelligence agencies deploy Pegasus for surveillance, often against journalists, activists, and dissidents.
Zero-Click Attacks: Pegasus can infect devices without any user interaction-simply receiving a malicious message triggers the exploit.
In summary, these vulnerabilities and malware exemplify the perpetual cat-and-mouse game between cybersecurity experts and threat actors. As technology evolves, so do the risks. Vigilance, timely patching, and robust defenses remain our best allies in this digital battleground.
1: EternalBlue Explained - An In-Depth Analysis of the Notorious Windows Flaw 2: LogoFAIL exploit bypasses hardware and software security measures 3: Putting the Eternal in EternalBlue: Mapping the Use of the Infamous Exploit
I honestly think that this is the issue that I have with my laptop rn. I downloaded an ai software for statistics and deleted it since it's really useless then this circus happened
Wintohdd rebuilt my windows bootloader once then windows crashed and I was directed to my bios and it said No bootable devices found
I had that error permission denied but after restart it worked fine i was like wtf but his videos are so helpful and knowledgeable
Wow , have been working with all this for years and somehow got everything fixed but never knew all the dissections , reasons etc .
But now that I know theory of everything feels so much better .
Dying with questions in mind is never good😂. But u made so many things about boot etc especially 1703 concept is game changer.
Just an addition is that sometimes the reserve folder hidden has not been assigned a letter in that case we need to assign a letter too, hope it helps someone needy hovering over comments😂.
And will have to waste a pendrive bootable for 1703.😂
Why MBR?
I have windows and disk instalednin GPT partitions and disk?
Or alternatively, can I reinstall a new windows on a blank drive, then somehow copy that functional boot partition to the corrupt drive?
Holy Smokes ! ISO Version 1703 was released in 2017 ! Not many folks have access to that version. MS Support doesn't offer it either. I'll need to check through my CD Library. However is there another way to get around the Access Denied error ?
Nope, that's the only way.
You can use this to get 1703.
th-cam.com/video/vZiSzSZPJiU/w-d-xo.html
Always great information; however, where is the link to create the USB drive you mentioned?
I found my clone drive didn't have no boot dir at all. after I did get them on it still won't start. It takes me back to repair screen. Wonder why it won't load/?
good evening, I have a problem, my Win 11 no longer works. Can you help me? I think my boot loader is gone, but my Win 11 folder is still there. Can you please help me with my problem?
thanks in advance
Worked for me! Thank you very much, only part that I got an error in was the last part, "Active" ?
Is the required ISO file included on the older original release's boot disk?
thanks man u saved my butt caus i accidentally changed my primary active drive and at next boot the system failed ur last command saved me..😇
Hi Thanks for sharing your valuable knowledge with us all!
I believe my reg files were corrupted after an update on my 2013 win10 upgraded Samsung NP350 laptop. For some reason the only thing I can access is the bios where I can modify the boot device to a usb but the win10 installations won’t even go past the window logo and a little turning wheel. So no startup repair or recovery or cmd option. The screen is turned on but blank. No specific noise from the hdd. What could someone recommend? (There was of course no installation cd with the laptop upon purchase and there’s no media installation download on the Samsung support. I am about to go nuts!
I get a blue screen after trying to install some Audio software... Would this help to recovery the system? Thanks, I tried all the standard options by the way and using a windows repair was not working for me.
Hi! I installed fresh Windows 10 Home version 19045 but I face 4-5 reboots till normal start . If this procedure followed will not work , could be a faulty bios and need to be updated ? Thank you!
10:21 it would to tell how to make sure to boot to MBR vs UEFI
I've tried this several times but still unable to restore the boot sector, so let me try this a different way, Can i convert the drive to uefi then fix the boot so I can keep the system? I would eventually like to try adding windows 11 in a new partition but I really want to fix the computer first without having to try restoring al my preferences.
all i did was accidentally reset my pc when it had an update installing..
i was working on something and i realized i didnt have a usb port plugged in that i needed, i reached around my computer to plug it in and when i did i had accidentally hit the power button on the tower. the screen went black and so i instinctively hit the power button to turn it back on and when i did i noticed that my computer had started an update and was at 2% already by the time i reached over to hit the button again. i got a bad pool caller error code, someone suggested i update my bios which i did and no i have an inaccessible boot device error and my command prompt WILL NOT register that i even have a valid windows 10 key. all this over accidentally hitting a damn button? is there anything i can do to fix this? i have a flash drive with a windows 10 boot on it but my problem PC will not accept it, all it says is that the computer cannot repair or accept the boot file.