Using the deployment image servicing and management tool (DISM)
If you ran the system file checker on your PC and the tool was unable to repair corrupt operating system files, you may wish to try the DISM or deployment image servicing and management tool. This tool can download fresh copies of corrupt Windows system files directly from Microsoft.
Note – If you haven’t run the system file check tool (SFC) yet, then please see this tutorial first.
The DISM tool can only be used from the command prompt, but don’t worry, it’s really easy.
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For reference, the two commands you need to execute are:-
dism /online /cleanup-image /checkhealth dism /online /cleanup-image /restorehealth
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