Windows OS Repair

CHKDSK

Run to check the disk for corruption on the NTFS partition.

chkdsk

SFC

Run SFC to check for corrupted system components.  If some are found run DISM and then rerun SFC.

sfc /scannow

DISM

Run if SFC found corruption to repair the component store and then rerun SFC.

Dism /online /cleanup-image /restorehealth

Resources

https://rtech.support/guides/dism-sfc/