Press the Start key and type the word Powershell,
right click on the command prompt and select Run as administrator,
enter the following commands one by one followed by the Enter key:
•- DISM.exe /Online /Cleanup-image /Scanhealth
•- DISM.exe /Online /Cleanup-image /Restorehealth
•- DISM.exe /online /cleanup-image /startcomponentcleanup
•- sfc /scannow