Sorry for reviving this old thread, but my comp is still restarting when playing Call of Duty. I installed the latest video card drivers, re-installed Call of Duty and updated to the 1.4 patch. I don't think it's overheating because I keep checking BIOS and the temperature never gets above 55 C. Power shouldn't be a problem, and I don't think it's faulty parts because it only restarts during Call of Duty, not surfing the internet or anything like that. Also, I don't think it's that the comp can't handle the games because I ran FRAPS and the fps never get below 60. I am completely at a loss here. There's only one more thing I can think of. Is there a setting in BIOS that tells the computer what temperature to restart at? Maybe BIOS think it's overheating, when it actually is doing fine. Is that possible?