Lenovo G510 Can't reach BIOS ; BootMenu ; Windows

[rimasr]

Hey guys, I have a problem. I've just bought Lenovo G510, installed Windows 8.1. After installing few Intel drivers - Chipset, Rapid Storage technology, Management Engine Interface, VGA drivers and a ATI VGA driver, the screen just turned black with only cursor which I can see only when I move it. After restarting computer, same thing occurs. And not only this thing happened - after this problem, I can't access BIOS and BootMenu. I tryed fn+F2, fn+F12, F2, F12 - it just boots Windows. What should I do? Please help...

 

[rimasr]

Ok, so I've found out that there's OneKey Restore behind on/off switch. From there I I can reach BIOS and BootMenu. Right now I'm reinstalling Windows. Could anyone recommend from where should I get drivers?

 

[Fanex Buster]

I have the same problem. Hoe do I fix it?

 

[NOT_PROVIDED_156]

I have the same problem. Hoe do I fix it?

Press small button next to power button when notebook is switched off and you'll see the menu where you can select BIOS.