My desktop computer shuts off unexpectedly. It shuts off at any time, after startup, after hours of use..sometimes it doesn't even complete startup before shutting off. It sometimes even takes 3 to 6 attempts, in a row to keep it on. It soesn't seem to totally shut off though, as the power light is still on. It is not in hibernation or standby, I have turned these off. I must hold the power button in until it shuts off and restart it. The reset button doesn't work when in this mode. Any suggestions on how to stop this?
My computer is a gateway running Microsoft XP