Acer eRecovery
Hold the Alt key and press the F10 key simultaneously at Acer Logo
Dell Recovery
Press Ctrl + F11 at the Dell logo.
HP and Compaq Recovery
Press F10 at the HP logo until the recovery screen appears.
Gateway Recovery
Press F11 or the R key.
VAIO Recovery
Briefly press the F10 key.
ASUS Recovery
Tap on F9 when Asus logo appears.
Toshiba Recovery
Press F8 and then select Repair Windows.