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WU_E_SOURCE_ABSENT
WU_E_SOURCE_ABSENT means the update handler needed a source file or installation source that was not available. Unlike a network download error, the needed source can be local installation media, a component store source, or another baseline resource referenced by the update.
What to check
- Read the earlier installer and servicing records to identify the exact missing source.
- Check removable drives, network installation sources, mounted images, or content-store availability as appropriate for the package type.
- Use a matching, trusted source for the Windows version and update level; do not substitute files from an arbitrary system.
Microsoft: IUpdateInstaller interface
Microsoft: Windows Update common errors and mitigation
Microsoft: Windows Update error reference
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