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/