Windows Vista Power down then up on start up

I just noticed my machine acting strange. When I power up from a cold boot, after a long shutdown, the machine powers up for 1 sec then powers down completely 1 or 2 secs then boots to Vista. I can't figure out what is happening. I cleared the CMOS upgraded the BIOS but for whatever reason when I push the power button, it powers up, down, up then boots. Any ideas what is causing this? Is it defragging a boot file and stuck doing it? I'm out of solutions...ckdsk reveals no errors, nothing in startup files to indicate a problem...thanks...

 

Make and model of the system?
I've seen something similar on Gateway systems.

 

Again, I thought I uninstalled Intel's Tuning Utility however I discovered it was still active in the registry and was interfering with the BIO's on start up. Removed from registry through uninstall key, finally works, RESOLVED thanks.

 

Thanks for letting us know!

Good Luck!