Use this procedure when Windows reports system-file corruption or support specifically asks you to repair Windows components.
Save your work.
Open Command Prompt as an administrator.
Run the following commands one at a time, waiting for each to finish:
DISM /Online /Cleanup-Image /CheckHealth
DISM /Online /Cleanup-Image /ScanHealth
DISM /Online /Cleanup-Image /RestoreHealth
sfc /scannow
Keep the computer connected to the internet while DISM runs.
Restart the computer after the commands finish.
If a command reports an error, record the message and contact support. Do not delete Windows system files or download replacement system files from third-party websites.
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