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| WU_E_UH_APPX_PACKAGE_FAMILY_NOT_FOUND | WU_E_UH_UNEXPECTED |
WU_E_UH_APPX_SYSTEM_VOLUME_NOT_FOUND
WU_E_UH_APPX_SYSTEM_VOLUME_NOT_FOUND means the AppX deployment subsystem could not identify a package volume that is marked as the system volume. This can happen if package volume configuration is damaged or the expected system mapping is unavailable.
What to check
- Review the package volume configuration and verify that the system drive is healthy and mounted normally.
- Look in the AppX deployment event log for volume-related failures.
- If the image was heavily customized, verify that AppX package-volume configuration was not broken by the customization.
Get-AppxDefaultVolumeMicrosoft: Get-AppxDefaultVolume
Microsoft: PackageVolume class
Microsoft: Windows Update error reference
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