Windows Xp And My Comp Restarting

[l[wolverine]l]

I had windows 98 and when i played full screen games I could play for ever with out problems. I installed XP and know when i play full screen games (mostly starcraft) my comp will just suddenly restart. Ive tryed reinstalling Starcraft and my other games and even reinstalling XP but its still doing it and its getting on my nerves. HELP!!!!!!!!!!

[nocode]

Post your specs.

Are you using the latest drivers for your video card? Did you do a clean wipe of your hard drive before installing XP, or did you use an xp upgrade version? Have you tried playing any of the games that crash full screen in window mode to see if you get the same results? Are you aware of what your case and cpu temps are, and if so, what are they?