Today I updated a SharePoint Server 2010 test virtual machine with service pack 1 (SP1; Foundation and Server) and the August 2011 cumulative updates for SharePoint Foundation and SharePoint Server. I ran the SharePoint configuration wizard after installing all the updates. When I rebooted the server (suggested when encountering the User Profile sync problem after applying the patches) and tried to open one of the team sites, I received a 503 Service Unavailable error (as shown in the picture below). Service Unavailable – HTTP Error 503. The service is unavailable. Once I got over the “what did I do??!?” moment, I of course recognized this as an IIS error, not…