Computer suddenly turns off/on
Hi,
A couple of days ago while I was using my pc it suddenly turned off, no blue screen, no error, just as if i logged off and shut it down. Shortly after, it turned itself on, starting windows then shutting off again.
Often it would be on for 5 minutes or less, and it shuts itself off and tries to turn on again. Sometimes it hasn't even finished loading windows and it shuts itself off. When I'm lucky it doesn't even do this but it's rare.
Any help would be appreciated. Thanks.