If you are running Update Services in SBS 2003 R2 or just WSUS on any versions of SBS 2003, the WinVerifyTrust update (KB 938759) will be set to mandatory and installed on your WSUS server. See below for more information.
A couple of weeks ago, I posted <http://blogs.technet.com/wsus/archive/2008/06/05/windows-vista-sp1-available-to-wsus.aspx> about Windows Vista Service Pack 1’s availability to WSUS. In that post, we mentioned that you should install the WinVerifyTrust update (KB 938759) if you are running your WSUS server on a Windows 2003 server to prevent Windows Vista SP1 from being continually re-downloaded to the server once the service pack is released to WSUS.
Today, we’d like to let you know that, in order to make sure all customers are well protected, we will be marking this particular update as mandatory, which means it will appear in the Updates/WSUS Updates node of the Admin console, and will be auto-approved by default (since the “Advanced/WSUS Updates” checkbox is checked by default in Options/Automatic Approvals).
After this update has been marked as mandatory to WSUS for a short period of time, we will release Windows Vista Service Pack 1 to WSUS. We believe that this change will help make sure all customers have a good experience once SP1 is released to WSUS, and will also ensure that WSUS can be used to deploy other large updates we may release in the future.