My computer randomly restarts and it is really frustrating. I am thinking of replacing the power supply and the mobo, but both are very new and good quality. I got an Inwin case with a powerman 300 watt power supply three months old. I got an IWILL KK266 mobo and an Athlon 1.33ghz. I have recently put a maxtor ata 133 7200 RPM HD and that might be the culprit. Frankly I dont know what the problem is for sure! Give me some input for what I should do! thanks!