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WU_E_UH_OPERATIONCANCELLED
WU_E_UH_OPERATIONCANCELLED means the handler started work but the install operation did not run to completion because it was cancelled. The cancellation can come from Windows Update itself, policy, shutdown, user action, or a higher-level failure.
What to verify
- Search the log for the first cancellation-related message, not just the final HRESULT.
- Check for service restarts, shutdown events, maintenance window limits, or policy changes at the time of the failure.
- If the update was cancelled because applicability changed, a fresh scan may be enough.
Microsoft: Windows Update log files
Microsoft: Windows Update issues troubleshooting
Microsoft: Windows Update error reference
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