Finally, click on the “Apply” and “OK” buttons.Check “Service status”, if it’s “Stopped” click on the “Start” button.
Then it will open the “Properties” window. Scroll to the bottom until you see the “Windows Update”. To fix the “ We could not complete the installation because an update service was shutting down.” error, first, we have to check the Windows update service run properly. How to Fix Windows update service was shutting down. Potential reasons for Update Service Was Shutting Down.