Unlock dell Inspiron, Vostro, xps & Latitude, System or Administrator Password

go to: dell-service-ta... unlock dell laptop & Notebook displaying the service tag enter user password: Unlock Dell: Inspiron 15 (N5010), Inspiron 15R N5110, Inspiron 15 N5040, Inspiron M5040, Inspiron 15 N5050,
Inspiron 14Z 5423, Inspiron 13z N311Z, Inspiron 14 (N4050), Inspiron 15 3520, Inspiron 15 3521, Inspiron 15Z
5523, Inspiron M511R, Inspiron N4030, Inspiron M5040, Inspiron N5050, Inspiron 15 3000,
Dell: Vostro 1440 Vostro 1540, Vostro 2420, Vostro 2520, Vostro 3300, Vostro 3400, Vostro V131, Vostro
3550, Vostro 3700
Dell: XPS 14 (L401X), XPS 12-9Q33, XPS 15 9530, XPS 15
Dell: Latitude 3440