Last december, I built a computer. Now I am having some problems with it. It keeps restarting! Its so frustrating. I have ruled out the possibility of software problems and the power supply unit. It has happened hafe way through installing 2 different programs which can cause problems for it. There have been times when I have removed the cpu heatsink. I put thermal grease on it when I built it but never re-applied it. I don't know if this could cause it or not. Please help! lol By the way, I have an AMD Althlon 64 x2 3800+ (am2) if that helps.