WSUS not working after installing KB2720211

Over the week, I have a problem on WSUS of my customers and struggled with that for awhile, I tried to install the KB2720211 and post-installation the WSUS crushed and didn’t work anymore, most likely it comes from the KB.

 

Got some error on event viewer like:

Error: Connection Error.  An error occurred trying to connect to WSUS server.

 

The solution steps are:

 

  1. To change HKEY_LOCAL_MACHINE\Software\Microsoft\Update Services\Server\Setup\wYukonInstalled from 1 to 0
  2. Then install the update again
  3. reboot the server
  4. change HKEY_LOCAL_MACHINE\Software\Microsoft\Update Services\Server\Setup\wYukonInstalled from 0 to 1
  5. reboot the server install update AGAIN
  6. And the WSUS now works.

 

That was important for me sharing this solution with you guys.

Hope it was necessary.