Fix for Windows security center service not working

Method A

  • Start –> Run –> services.msc [enter]
  • Scroll down to Windows Management Instrumentation and double-click it.
  • Now click on the “Pause” button. Leave that window open.
  • Now Open  My Computer. Navigate to %systemroot%\Windows\System32\wbem
    (where %systemroot% is the drive where XP is installed).
  • Delete the Repository folder and *only* the Repository folder.
  • Now go back to the Windows Management Instrumentation service window you left open and restart the service.
  • This will rebuild the Repository and hopefully straighten out the incorrect entries for all your duplicates.
  • In order to see the Windows files, you may need to unhide them:
  • Make sure you are able to see all hidden files and extensions (View tab in Folder Options).
    1. Please select the Tools menu and click Folder Options.
    2. After the new window appears select the View tab.
    3. Put a checkmark in the checkbox labeled Display the contents of system folders.
    4. Under the Hidden files and folders section select the radio button labeled Show hidden files and folders.
    5. Remove the checkmark from the checkbox labeled Hide file extensions for known file types.
    6. Remove the checkmark from the checkbox labeled Hide protected operating system files.
    7. After this please press the Apply button and then the OK


Method B 

Open a command window (Start — > Run –> cmd) and run the following commands:


  • net stop winmgmt
  • cd /d %windir%\system32\wbem
  • ren repository repository.old

     (or delete it using the command “rd /s repository” instead of the ren command)

  • net start winmgmt




Kuttus is an IT professional and a part time blogger. He has started the 123seminarsonly to write his findings gained in daily work life. Kuttus writes articles which are mostly related to technology and Virus Removal. He has been interested in virus and Malware removal. He is working as a remote virus removal technician from the last 7 year.

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