windows 8.1 desktop won't shutdown after format. Please Help!!

I bought a new graphics card (Asus gtx 660) so I thought I should format my pc. I installed all the drivers and wasn't having any problems, but when I turned it off it wouldn't shutdown. The display would turn off but not the computer. I'm using windows 8.1 and I have already disabled hybrid mode (it didn't work). Any help would be appreciated.
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  1. I had a similar issue. After upgrading to Windows 8.1, my Dell Inspiron laptop would no longer sleep. Any attempt to make it sleep would result in a full restart.

    It turned out that this was due to the AMD catalyst drivers. Any attempt to remove the drivers using the Catalyst software resulted in a blue screen crash (thread_stuck_in_device_driver). In the end, I uninstalled the AMD Radeon HD 7730M device through the Device Manager, and then installed the lastest AMD drivers from the Dell website. (These are the bespoke Dell AMD mobile drivers. The latest Catalyst drivers from the AMD website don't work.) This fixed the issue and my laptop now sleeps again.
  2. Best answer
    do you have the latest bios drivers for your motherboard, might be an issue with the GPU on an old version of bios...
  3. I'm going to try updating the BIOS tomorrow if it works I'll pick you as solution, thanks for the help guys.
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