Start Command prompt

- Click on your Windows icon (Start button)

- Type 'cmd'
- Right click on cmd (app) to show options menu
- Left click on 'run as administrator' to execute options

- Left click on 'yes' to allow 'Windows Command Processor' to make changes to your device
This will start the command prompt terminal window

- Type 'C:\WINDOWS\system32>sfc /scannow'
- Press enter
- The above command will find and fix corruption with System files in Windows.

- Type 'exit'
- Press enter
- This will exit the command prompt terminal

Still having issues:

If you have already tried (DISM) and you are still having issues
You might need to book a Navada Service
The issue could be hardware related.

Other options:

SFC can scan individually targeted files.
Additionally, SFC can be used when the system can not boot.
However, this article to to show the basics.