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WU_E_SKIPPED_UPDATE_INSTALLATION
WU_E_SKIPPED_UPDATE_INSTALLATION means the installation workflow was configured to install merged updates only, so a non-mergeable update was skipped. This can be expected behavior when the caller deliberately selected a restricted update collection.
What to check
- Review the update collection and installation options used by the caller.
- Confirm whether the skipped update was intentionally excluded or should have been installed independently.
- Do not treat the code as a payload failure until you have verified the selection logic.
Microsoft: Searching, downloading, and installing updates
Microsoft: IUpdateInstaller interface
Microsoft: Windows Update error reference
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