Automatic Updates (AU) are critical to companies and end users because they keep the systems up-to-date with the most recently security patches, hotfixes, drivers, etc...
Most of the time AU will work without issues but unfortunately this doesn’t apply to 100% of the scenarios. The good news is that you’ll find most of the manual fixes on the web with a little Google search, the bad news is that in some scenarios you may crash your system trying to fix that.
For full AU reset Microsoft has a tool "Microsoft Fix it" that may help you with this task minimizing the risk of mistakes, of course you always have the “old school” method if you want.
Have a look at KB 971058
For AU troubleshooting check KB 906602