Vista shutting down my computer

[VashHT]

So I have vista ultimate 32bit installed on a backup hdd that I have, and I've been trying it from time to time. I like it overall, but my system consistently crashes on it, so it makes it of course unusable.

I looked in the problems and solutions section, and it said something along the lines of video hardware failure. It makes sound as if my video card is bad, but I have zero problems in XP, so I think it may be the ATI drivers. It usually crashes while gaming, and my computer just turns off. No error screen no restart it just turns off. I was having a problem with my old power supply, and my computer was doing this in XP as well whenever I ran a 3d app. However I have replaced my old antec psu with a PC P&C PSU. That cleared up all the problems I was having in XP, and I thought it would have helped in Vista too, but it didn't. So now I'm leaning towards ATI drivers as the problem. Has anyone had any problems similar to this with an ATI card? I installed 7.3 right after I installed Vista, with CCC and everything. I suppose I should jsut clean off all the drivers for it and reinstall just the video driver, bt was wondering if anyone had experience with this problem.

 

[Brazen]

As you were describing it, my thoughts were either weak PSU or overheating. I see you have recently replaced your PSU. Maybe bad harddrive? I would have suggested trying getting rid of the ATI drivers and use just whatever Windows includes, but that probably won't bode well for your gaming.

 

[VashHT]

Yeah PSU was my first thought too, because the problem was occurring in both XP and Vista. After I replaced it the problem went away in XP though, so this is something Vista related. Hard drive may be the problem, maybe I'll try to find an extra one and see how that works out.

btw i dont have my computer specs in my sig or anything so I'll post them ofr reference now.

Athlon X2 4800+
Abit AN8 Sli
2gb Corsair XMS
X1900XTX
PC P&C 610W PSU