Did you make any change to computer?
When do we get this message?
Follow the steps mentioned below:
How to troubleshoot a problem by performing a clean boot in Windows Vista or in Windows 7
Note: once you complete the troubleshooting with clean boot follow steps 7 to place the computer back to its usual way
Start your computer in safe mode
If none of the options work perform system restore
What is System Restore?
Reply back with results
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