Troubleshoot:After upgrading to Windows 8.1 Sleep mode will not work Error

After upgrading to Windows 8.1 Sleep mode will not work

I just upgrade to win 8.1 from win 7 and now my sleep mode doesn't work.
My computer will not go to sleep automatically.
I can put it to sleep but using the power plan settings it won't go to sleep.
Any help is appreciated.
Thanks, 
Tom

Solutions to the Problem After upgrading to Windows 8.1 Sleep mode will not work

Download SmartPCFixer to Fix It (Free)

• Download the Microsoft Windows ISO (installation device) from the following website:
  
• http://www.microsoft.com/en-us/software-download/windows10
• Users must select the appropriate ISO, either 32 bit or 64 bit, depending upon their individual computer.
• Extract the ISO file to a separate USB device or burn the program to a compact disc.
• Run the Microsoft Windows 10 upgrade directly from the software that you have thus created.

Another Safe way to Fix the Problem: After upgrading to Windows 8.1 Sleep mode will not work:

How to Fix After upgrading to Windows 8.1 Sleep mode will not work with SmartPCFixer?

1. Click the button to download Error Fixer . Install it on your computer.  Open it, and it will scan your computer. The errors will be shown in the scan result.

2. After the scan is done, you can see the errors and problems which need to be fixed.

3. The Fixing part is finished, the speed of your computer will be much higher than before and the errors have been removed.

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