Invalid security token when updating Windows Media Center



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Yesterday, one of my customers called me and told me that he received an error Invalid security token when updating Windows Media Center on Windows. I had never heard of this problem, so I did some research on this error message and discovered that it could be caused by a poor or corrupt Windows Media Center library. So I decided to rebuild the Windows Media Center library.

Invalid security token

The Library folder is a file protected by the system. We must first enable Show hidden files and folders and Show files protected by the system.

  • Go to the Windows Menu screen 8
  • Type Folder Options and select Settings and click Folder Options
  • Now click the View tab and search Hidden Files and Folders.
  • Then click Show hidden files, folders and drivers & Turn off Hide protected files from operating system

Rebuild Windows Media Center Library

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After enabling these options, follow these steps :

  • Press Win + R and enter %Program Data% and press Enter.
  • Then enter the Open Microsoft folder, then.
  • You now see a file named mediacenterdatastoreDB. Delete this file and reboot the system

After rebooting, Windows Media Center seemed to work. I am sure that this way of proceeding will also help you if you are faced with a similar problem.



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