PC will not completely shut down

[ecws100]

I upgraded my PSU, motherboard, processor, and drive. At first the system would shut down but now when I try to shut it down the monitor and keyboard shut off the the system doesn't and all the fans stay on as well. I tried clearing the CMOS and started the PC and shut it down after a couple minutes and it worked. Then I played a game for a couple hours and when I tried to shut it down the same thin happened. The monitor and keyboard turned off but not the PC. Would appreciate any help. Thank you.

 

[geofelt]

Try holding the shift key down while you click on the shutdown button.