Microsoft Windows Server Update Services (WSUS) enables information technology administrators to deploy the latest Microsoft product updates to Microsoft Windows Server 2000, Windows Server 2003, and Windows XP operating systems. By using Windows Server Update Services, you can fully manage the distribution of updates that are released through Microsoft Update to computers in your network.
Brief Overview:
http://www.microsoft.com/windowsserversystem/updateservices/evaluation/overview.mspx
Full Overview: (Download)
http://www.microsoft.com/downloads/details.aspx?FamilyId=2478D594-A29C-483C-9DC1-9740BF3081A5&displaylang=en
Windows Update Services 2.0 Download:
http://www.microsoft.com/windowsserversystem/updateservices/downloads/WSUS.mspx
Windows Update Services 2.0 Diagnostic Tool:
http://download.microsoft.com/download/7/7/4/7745a34e-f563-443b-b4f8-3a289e995255/WSUS%20Server%20Debug%20Tool.EXE
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