http://blogs.technet.com/b/sus/archive/2008/07/10/troubleshooting-wsus-clients.aspxClient communication When troubleshooting clients, the first thing you'll want to look at is the windowsupdate.log which will be in c:\%windir%\Windowsupdate.log. In order to understand how to read the windowsupdate.log , the reference for it is locateden-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)http://blogs.technet.com/b/sus/archive/2008/07/10/troubleshooting-wsus-clients.aspx#3137257Thu, 16 Oct 2008 16:24:49 GMTd5e57398-b9ef-4490-9955-07cbb4e4a80d:3137257The WSUS Support Team Blog<p>You're probably already well aware of Microsoft's CodePlex open source project hosting website but in</p> <img src="http://blogs.technet.com/aggbug.aspx?PostID=3137257" width="1" height="1">