I have recently been having my computer reboot itself several times during the day.  It starts with without any information on the screen when I start to computer up.  After many retries it will go through the normal booting sequence.  Shortly with in one minute the computer will reboot itself.  I will reboot itself approxmately five times back to back.  I do not get any error messages, so I am lost to why this is occuring.

I bulit this computer myself and have been using it without any problems until the last three days.  I have ran an anti-virus, spyware and malicous software program and come back as my computer is clean of these potental programs.

HELP lost for what has gone wrong.

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