I've been getting a lot of random crashes when playing games lately. The system is perfectly stable when running any other applications. Microsoft's memory diagnostic says that my system memory is fine, but windows says that hardware memory corruption is likely when I look at the error report. Can you recomend a free diagnostic for video cards?
I've had random restart problems before, and could not even figure out the problem until many months later. The blue screen mentioned something about nv4_disp.dll, so I tried reinstalling my video card drivers. But that didn't help. Eventually, my power supply began to make a loud grinding noise, and had to be replaced (it was still under warranty). Then everything was okay.