I can't enter boot menu on win7.

[Adxey]

I've choosen the speed of the booting 'fast' before in boot menu and since then there is no option to enter boot menu. (Nor 'press F12 to enter boot menu' sign shows up) My PC (Toshiba) got bricked and I want to install windows.

 

[DarnitD]

try holding down f2 then power on your computer.