MMC class not registered error

I recently ran into the error MMC class not registered error when right clicking Computer and going to manage this also happened when trying to get into the device manager.   The internet including Microsoft’s Fix-it Utilities and several forums did not produce a solution.  Ironically I had forgotten about a post I made less than 48 hours ago that featured a link to Bill Mullins’ review of’s repair utility for Windows.  In order to fix this error on a known virus free computer, I simply let the program perform a SFC / scannow and went to Start Repairs (skipping the other steps), Custom and selected to register system files.  Once I let the utility finish and rebooted, the MMC’s worked great.   The utility currenty registers the 1000+ files thus fixing many problems.


About TCAT Shelbyville IT Department

The Tennessee College of Applied Technology - is one of 46 institutions in the Tennessee Board of Regents System, the seventh largest system of higher education in the nation. This system comprises six universities, fourteen community colleges, and twenty-six Applied Technology Colleges.
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