Hello Frank,
Thank you for posting your query on Microsoft Community Forum.
As per the issue description your computer is not going to sleep. So, I would appreciate if you can provide us the following information to help us understand the issue better.
- Did you make any recent changes on your computer prior to the issue?
- Have you set any time under Change when the computer sleeps to make your system sleep?
Try the below mentioned methods and see if it works for you.
Method 1
Try to run Power Troubleshooter which is built in troubleshooter and you may follow the steps mentioned below to run it.
- Press the Windows key and X at the same time.
- Now click on Control panel.
- In the search box of Control Panel type Troubleshooter, and select troubleshooting among the list.
- Under System and Security, click Improve power usage.
- Now try to run the troubleshooter and check if it helps.****
Note: If you're prompted for an administrator password or confirmation, type the password or provide confirmation.
Method 2
If issue persist, I would suggest you to Reset and restore the power plans to default.
- Press Windows key and X at the same time.
- Choose Command Prompt (Admin) from the context menu.
- In the command prompt, type powercfg –restoredefaultschemesand hit Enter.
- Exit command prompt.****
Note: This would reset the power plan settings to default. Any customized power plans would be removed.
Method 3
If issue still persist try to check the system files are they working fine or not and to check that try to run System File Checker (SFC) tool.
SFC scan will scans all protected system files and replaces incorrect versions with correct Microsoft versions.
How to use the System File Checker tool to troubleshoot missing or corrupted system files on Windows 8.
- Press Windows key and X at the same time.
- Choose Command Prompt (Admin) from the context menu.
- In the command prompt, type sfc /scannow and hit Enter.
- Exit command prompt.
For more information refer to this link:
Use the System File Checker tool to repair missing or corrupted system files
http://support.microsoft.com/kb/929833/en-us
Hope this would help. If issue still persists post back with current status of your computer and result of proposed suggestion, we will be happy to assist you.
Thank you.