My iMac Intel shuts off by itself and restarts

Hello,
This mac seems to sort of shut off on it's own. It doesn't completely turn off though. It doesn't really go through the boot process... it just goes back on as if it were sleeping. Unfortunately, it does it while I'm working on it. I could be just surfing the web.
Can anyone help?
Thank You,
Marc

Hello the:
Could be a number of things (probably not software).
Try resetting the SMC:
http://support.apple.com/kb/HT3964
Barry

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Boatmoter, welcome to the forum.
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My iMac Intel shuts off by itself and restarts

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