Glitches and artifacts after accidental wrong underclock

[goa604]

I was playing with MSI Afterburner and instead of 1200 memory speed i somehow entered 120, after that everything distorted and i got BSOD. the problem is now that every time i log into my pc account everything turns into artifact at desktop, im now using a guest account with no privileges and everything is working fine, as soon as i log into my account everything turns into a big artifact. What can i do?
Its Hd5770 if that helps.

 

[rgd1101]

can you log into safe mode?

 

[goa604]

can you log into safe mode?

No, it stops at loading drivers and artifacts appear at the top of the screen.

 

[rgd1101]

does it have integral graphic? if it does you could remove the Hd5770 and run it on the integral graphic.

 

[goa604]

Guys i somehow managed to enter control panel- users then drivers crashed but luckily they recovered and i had enough time to make my guest account administrator.
Guest accound works fine and i managed to uninstal drivers and my acc works now, right now im downloading new drivers and ill see if everything is ok.
I think i fixed it. Thank you anyways!