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To ensure that the self-update tree is working properly, first make sure there is a Web site set up on port 80 of the WSUS server. Next, type the following at the command prompt of the WSUS server:
cscript WSUSInstallationDrive:\program files\microsoft windows server update services\setup\InstallSelfupdateOnPort80.vbs
If you have WSUS client self-update running on port 80 of the WSUS server, see the next section.
TechN et Self Update Tree Troubleshooting