Reverted? I haven't ever changed them at all.
wierd that registry cleaner won't remove those. i've never had a problem with that. Could try in safe mode.
But recently my computer has been really agitating me because when I've tried playing a game like dota2 or deus ex, the issue described in the title happens. Suddenly, and without warning the screen will go black and the sound will begin skipping. At the same time the GPU fan ramps up to what I'm guessing is 100%, and the whole thing freezes.
Does this statement mean your issue only occurs when gaming? If so, try removing one card and gaming on one card only. If that works fine, switch cards and see if you are able to game on the other card. This will better rule out video issues than installing the latest drivers. Could be one card is going bad.
also try this please. sorry this is taking so long, i'm really jsut trying to narrow it down.