Windows 7 Home keeps rebooting automatically

[Xenomorph]

Up until this time, I've had no problems with my Windows 7 Intel Nuc board system. It's worked fine for the last couple of years. In the last few days, Windows won't shut down and stay off, instead it keeps rebooting on it's own. If I click on Windows>Shut Down the computer, will shut down, then by itself automatically restart. If I press and hold the power button down, the computer will shut down but will automatically boot itself back up. The only way to keep the computer from rebooting automatically is to shut down, and quickly pull the power cord so it won't boot back up. Even though that is a fix, it's not right.

Why would Windows do this, and how can I fix it? Any and all ideas are welcome. Thank you.

 

[MeOnMine]

Hi, try to run a system file check and re-boot then see.