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WU_E_DM_CONTENTCHANGED
WU_E_DM_CONTENTCHANGED means the content associated with the update changed while it was being downloaded. Restarting with the newer revision protects the system from using an obsolete payload.
What to check
- Retry the download after the update service has published the current revision.
- For managed update infrastructure, check that metadata and content synchronization completed successfully.
- Investigate repeated occurrences for the same update: they can indicate stale caches or inconsistent server replicas.
Microsoft: Windows Update error reference
Microsoft: Windows Update log files
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