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WU_E_BIN_SOURCE_ABSENT
WU_E_BIN_SOURCE_ABSENT means a delta-compressed update could not be installed because the required baseline source was unavailable. Delta content contains changes relative to an existing source; without the expected source, the handler cannot reconstruct the target content.
What to check
- Determine which baseline package or source location the update expected.
- Check whether the original component was removed, changed, or stored on a disconnected volume.
- Use a full or current supported package from the official update source if the required baseline cannot be restored.
Microsoft: IUpdateInstaller interface
Microsoft: Windows Update log files
Microsoft: Windows Update error reference
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