Volume Shadow Copy requester

command line:
sfc /scannow
Some steps needed to try to "isolate" this...
1) For "Application", "Security" and "System" lists of events: Eventg Viewer -> Action -> Clear Events List
2) Then rebooting.
3) Checking Event View again to see warning or errors.
4) Again clearing all events, close Event Viewer.
5) After trying a cobian backup task again, checking Eventer View again.
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Source
Solved it in a very simple way:
In Cobian Backup 10 program go to:
1. Tools
2. Options
3. General
4. in: Service and Application Control; click on Settings
5. in: Volume Shadow Copy Requester; click on Stop; and than on Uninstall
6. Reboot your PC
7. Repete steps from 1 to 4
8. in: Volume Shadow Copy Requester; click on Install; and than on Start
9. Reboot your PC one last time
10. Make your backup using Cobian 10
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Volume Shadow Copy Service stopped working

Volume Shadow Copy can circumvent privacy when a document is deleted, even if the original has been overwritten by other data. Schneier on Security: The Security Implications of Windows Volume Shadow Copy
http://www.schneier.com/blog/archives/2009/12/the_security_im.html
What you should know about Volume Shadow Copy/System Restore in Windows 7 & Vista « Trying To Be Helpful
http://blog.szynalski.com/2009/11/23/volume-shadow-copy-system-restore/
StorefrontBacktalk » Blog Archive » Windows File Deletion: Going, Going, Still There
http://www.storefrontbacktalk.com/securityfraud/windows-file-deletion-going-going-still-there/
Excluding Files from Shadow Copies (Windows)
http://msdn.microsoft.com/en-us/library/aa819132%28VS.85%29.aspx