Troubleshoot Problems with the Windows Update Client

Occasionally, you might discover a client that isn’t automatically installing updates correctly. Such clients are typically identified during software update audits. To identify the source of the problem, follow these steps:
1. Determine the last time the client was updated. This can be done in two different ways—by checking the client’s registry (the most reliable technique) or, if you use Windows Server Update Services, by checking the Reports page on the WSUS Web site.

2. Examine any error messages returned by the Windows Update client by viewing the client’s %SystemRoot%\WindowsUpdate.log file. This text file contains detailed output from the Windows Update client, including notifications for each attempt to find, download, and install updates. You can also use the WindowsUpdate.log file to verify that the client is attempting to access the correct update server. Search for any error messages in the Microsoft Knowledge Base for more troubleshooting information.

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