Since the repair install will remove all Service Packs and security updates that may have been installed on your server, you cannot rely on Automatic Updates or WSUS to re-apply Service Packs or updates to protect your server. You will need to manually install Windows Service Packs and updates to protect your computer. Until you do your server will be unprotected against any vulnerabilities that were previously resolved by Service Packs or security updates.
Further thanks to the Microsoft Windows Update engineering team for clarifying the issues involved in causing AU to fail.
Article ID: 555616 - Last Review: Feb 14, 2017 - Revision: 1