Help solve my pc random restarting problem.

Hey guys,

Well i've had this problem for a while now, but its beginning to annoy me.

Basically i will have everything running, the apps open will be abc (bt client) and maybe mozilla firefox. Then a blue screen will flash up for a second and the pc will reboot.
I get a quick glimpse of the blue screen:
Something like... driver not equal to

So i'm guessing its a driver problem, is there a way to find out why my pc restarts? I went into control panel > admin tools > event viewer and it doesn't tell me anything.

It happens rarely, but if i play css for hours on end nothign happens, same for any other game.

Thanks for your help!

Also its not overclocking or anything, because if i run it at stock the problem is stil there.

Could it be motherboard bios?

Well....

I actually stumbled across the problem by total accident. It was the nvidia firewall which was leaking memory. My mem usage would often get to 1.5gb and i would have to restart. But i uninstalled that and installed zone alarm and had no restarts and pc has been running for a few days now.