If you encounter An unexpected error occurred in the WSUS Snap-in in Update Services console, follow the solutions mentioned here to fix the issue.

Non-running services: SelfUpdate<br><br>I use custom host headers and had removed the original blank entry for port 80 (turns out it's not really blank, it is a place-holder for "all unassigned".

In the Options section of the WSUS console, the Update Source is a central server that many different sites access. For internal reasons, I'm not allowed to set it to sync from MS Update.