Repair protected Windows system files

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If you think that your Windows system files are corrupt, you can check by using the sfc command.

SFC scans the integrity of all protected system files and replaces incorrect versions with correct Microsoft versions.


To repair your corrupt system files do the following:

  • Open a command prompt (CMD) as administrator.
  • Type
sfc /scannow

This scans integrity of all protected system files and repairs files with problems when possible.


If you only want to check for problems without immediately repairing them, do the following:

  • Open a command prompt (CMD) as administrator.
  • Type
sfc /verifyonly


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