need info to work with. what is the full computer model? what operating system? can you turn it back on immediately or do you have to wait? did you install anything prior to this issue? go into safemode, will it stay on there? finally at what point does it turn off - during the startup process, when you are trying to run certain programs? or what? be specific.
finally if you are able to get into safemode and it does not shut off, try doing a system restore to a previously save restore point prior to the problem. if you have an os disk, you can use that also.
Hi all!
I have a problem with my pc.I dont know why it restart when im using it normally.Then it just turn on again stay for some minutes and restart again.Any sugestion what to do?
Thank you!

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic