Usually we recommend runsystem file checker(SFC) utility to scan and repair windows system files.
This article explainswhat is DISM commandand its restorehealth function.
This is what Microsoft says onhow to best utilize DISM.
The command scan and repair the windows image using the install.wim file you specified as the alternative source.
Note If you have windows 10 installed on your equipment, check that to usewindows 10 ISOas source.
In Addition Check out Microsofts support pages to learn more onconfiguring Windows repair sourcesandrepairing Windows images.
Most of time third-party antivirus program interferes with the DISM during command execution result this error.
In addition active proxy, read-only access install.wim or windows update service not running also cause this error.
And to repair windows files you gotta trigger the SFC command.
The sfc /scannow command-line utility scan and repair protected system files in Windows PC.
No, DISM wont affect any of your apps or data.
It only repair critical core files required to run and gather information.
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