Running sfc/dism

1. Run command prompt as administrator.

Type cmd.exe in search and press "Run as administrator".

2. Run next commands in order: sfc /scannow dism /online /cleanup-image /checkhealth dism /online /cleanup-image /scanhealth dism /online /cleanup-image /restorehealth

That's how command prompt should look after both sfc and dism finished.

3. After it's finished, additionally you can run chkdsk /f /r /x to check your drive for corruptions.

After you'll press Y, reboot your PC.