hi, I've been having restart issues for some time now but I've been unable to figure out what was wrong. I've tried swaping out ram, endless fiddling with drivers and bios settings, etc. I restart mostly when I'm doing cpu intensive things- Loading into video games, loading into windows, and playing video games. Very rarely does it restart when I simply idle, chat, or surf the net. It does restart occasionally when doing easy stuff, but only occasionally. When I'm playing games it is VERY spikey, it will restart 10 times in 20 minutes and then be fine for 4 hours.. and then restart 10 more times over the next 30 minutes. It 'seems' like when I turn down video settings I restart less, which originally made me think it was a video card or memory issue but now leads me to believe it is the lesser stress on the CPU that is important. Anyone have any suggestions on how I can fix this? I don't 'think' I'm overclocking, but if someone could tell me how to check I would be glad to. I clean my CPU of dust as best I can, but I can't really see deep into there so there might be some dust I can't see clogged in- I don't know how to release the cpu and am really worried about hurting it somehow. I have an p4 northwood 3,4 cpu, I don't know the name of the fan but it is very fast a zalman. I'm using windows vista( used xp, same prob) if that matters. If you have any other specific questions I'll check this decently often and try to provide answers.