Troubleshooting:Computer does not shut down when turning it off.

Computer does not shut down when turning it off.

I have Windows 7 Home Premium and for the last couple of weeks when I go to shut down my computer, it won't shut down.  It starts to shut down then it goes back to log-in screen.  This usually takes from 10 to 15 minutes. Sometimes it takes 2 or 3 tries
and other times I have to turn it off.   What is causing this?

Keys to the Problem Computer does not shut down when turning it off.

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Hi,
·          Was there any recent changes made on your computer prior to the issue?
·         Do you get any error message?
 
Try following these methods and check if it helps:
Method 1:
It might be some third party application is causing this issue.
Put the system in clean boot.
Follow the steps mentioned in the article to configure the system in clean boot and check.
How to troubleshoot a problem by performing a clean boot in Windows Vista or in Windows 7
http://support.microsoft.com/kb/929135     
Note: After you have finished installing, follow step 7 in the article to boot to normal startup.
 
Method 2:
Refer to the Kb article and check.
You cannot make a computer that is running Windows 7 shut down or sleep
http://support.microsoft.com/kb/977307
 
Try running the performance troubleshooter and check if it helps.
http://windows.microsoft.com/en-US/windows7/Open-the-Performance-troubleshooter
 
Method 3:
Also check event viewer
Event Viewer is a tool that displays detailed information about significant events on your computer.
http://windows.microsoft.com/en-US/windows7/Open-Event-Viewer
 
Hope this helps,

Manually editing the Windows registry

Manually editing the Windows registry to remove invalid MACHINE_CHECK_EXCEPTION keys is not recommended unless you are PC service professional. Incorrectly editing your registry can stop your PC from functioning and create irreversible damage to your operating system. In fact, one misplaced comma can prevent your PC from booting entirely!

Caution: Unless you an advanced PC user, we DO NOT recommend editing the Windows registry manually. Using Registry Editor incorrectly can cause serious problems that may require you to reinstall Windows. We do not guarantee that problems resulting from the incorrect use of Registry Editor can be solved. Use Registry Editor at your own risk.

To manually repair your Windows registry, first you need to create a backup by exporting a portion of the registry related to MACHINE_CHECK_EXCEPTION (eg. Windows Operating System):

• Click the Start button.
• Type "command" in the search box... DO NOT hit ENTER yet!
• While holding CTRL-Shift on your keyboard, hit ENTER.
• You will be prompted with a permission dialog box.
• Click Yes.
• A black box will open with a blinking cursor.
• Type "regedit" and hit ENTER.
• In the Registry Editor, select the Error 0x9C-related key (eg. Windows Operating System) you want to back up.
• From the File menu, choose Export.
• In the Save In list, select the folder where you want to save the Windows Operating System backup key.
• In the File Name box, type a name for your backup file, such as "Windows Operating System Backup".
• In the Export Range box, be sure that "Selected branch" is selected.
• Click Save.
• The file is then saved with a .reg file extension.
• You now have a backup of your MACHINE_CHECK_EXCEPTION-related registry entry.

Another Safe way to Repair the Problem: Computer does not shut down when turning it off.:

How to Fix Computer does not shut down when turning it off. with SmartPCFixer?

1. Download SmartPCFixer . Install it on your computer.  Click Scan, and it will perform a scan for your computer. The errors will be shown in the scan result.

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

3. The Repair part is done, the speed of your computer will be much higher than before and the errors have been fixed. You can also use other functions in SmartPCFixer. Like dll downloading, windows updating and print spooler error repair.

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