Hello, I've noticed many users are having this or a similar problem w/ shutting down or computer won't turn off completely, then restarts by itself! It has to be a hardware problem, but I haven't been able to find a definate solution to this prob which is plaguing my new computer and another one. Hasn't anyone narrowed down what the problem is?
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Check in your BIOS and make sure that Wake on Keyboard or Wake on Mouse and Wake on LAN are disabled. That's usually the issue.
Believe me Chicken, I've tried very common and uncommon solution to this hardware snaffu and nothing has worked. I'm not getting a straight answer from the big manufacturer's either. Gigabyte told me just to send it back RMA, woooptie-dooo!