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

February 2021 Update:

We now recommend using this tool for your error. Additionally, this tool fixes common computer errors, protects you against file loss, malware, hardware failures and optimizes your PC for maximum performance. You can fix your PC problems quickly and prevent others from happening with this software:

  • Step 1 : Download PC Repair & Optimizer Tool (Windows 10, 8, 7, XP, Vista – Microsoft Gold Certified).
  • Step 2 : Click “Start Scan” to find Windows registry issues that could be causing PC problems.
  • Step 3 : Click “Repair All” to fix all issues.


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.

RECOMMENDED: Click here to troubleshoot Windows errors and optimize system performance

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