My computer restart again when I shut down it.

[mdawlad]

I have a windows 7 PC. have Gigabyte g41 Combo motherboard with 2 GB ram and dual core processor. When I shutdown my PC , it starts automaticaly again. Only swith of the UPS can shut it down. Plz help me to solve this problem.

 

[livix07]

Maybe the power button on the case of the computer is defective. There probably is a contact all the time.
In order to test it you have to disconnect the power button from the motherboard and test it with a Multimeter for continuity. You can use the Ohm measurement unit.
Please take a look at this video tutorial: