http://techreport.com/news/26932/windows-8-1-august-update-causes-crashes-gets-pulled  

Trying to avoid the questions on the computer page.  If you have a new Windows 8.1 computer and auto update you might be in trouble.  Heard about it on the radio and found this link that explains the problem.

I'm sorry for posting here but as I said most of you only visit the computer page after you have a problem.

There are other sites with information too.

"The latest major update to Windows 8.1 wasn't just underwhelming. Turns out it has a host of other issues on top of that. As PC World reports, Microsoft has taken the unusual step of pulling the update and advising early adopters to uninstall it. Here's the scoop:

Specifically, Microsoft identified three known issues regarding the “behavior” it had seen when users installed the update. First, fonts that are installed in a location other than the default fonts directory (%windir%\fonts\) cannot be changed when they are loaded into any active session, essentially locking them in. Second, fonts don’t render correctly. The third issue is the most critical, however: Microsoft said that it is investigating reports that systems may crash with a “0x50 Stop error message” after the updates are installed.

Microsoft provides instructions to undo the damage under the "Mitigations" headers of this knowledge base article. Users are apparently expected to restart in safe mode, delete a file in their Windows directory, and make changes to registry entries. What a fun way to start the week."