My computer turns on, then off?

Is it on a loop or does it finally takes you to the desktop??

It sounds like your master boot record went bad.

Turn pc on and press F8 before pc boots on.

fixmbr.

there might be something loose in the computer. open it up and make sure there is nothing loose. does it boot to windows if it does you might have a virus. try a linux live cd and see if your computers functions alright if it does then it is not your computer but windows. If that is the case the easiest method would be to reinstall windows after backing up your data with the linux cd. Same thing happened to one of my friend's pc and that was the only way i could fix it.

good luck

You could have a virus on the computer. Get it fixed at Fry's or Best Buy

Some possible answers.

http://www.5starsupport.com/xp-faq/1-44.htm

Are you hitting the power button with your knee?

You may have a viris or the mother bored may be on the fritz

Call Best Buy theyll help u

that happens to me when my computer is dying. try plugging it in

Mine too. It has an on - off button.

restore it. when it is starting up. keep pressing F11