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WU_S_UPDATE_ERROR
WU_S_UPDATE_ERROR is a success-level summary status. It means that the overall Windows Update Agent operation completed, but one or more updates in the selected collection reported errors.
How to investigate
- Read the result for each update rather than relying on the aggregate status.
- Separate scan, download, and installation failures; the remedy depends on the phase that failed.
- Use the WindowsUpdateClient events and the update-specific HRESULT to identify the failed package or dependency.
Microsoft: searching, downloading, and installing updates with WUA
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