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WU_E_UH_APPX_PACKAGE_FAMILY_NOT_FOUND
WU_E_UH_APPX_PACKAGE_FAMILY_NOT_FOUND means the update expects a particular AppX package family name (PFN), but that package family is not currently present.
How to verify it
- Use PowerShell to list installed packages and confirm whether the expected PFN exists.
- If the package was removed, the update may no longer be applicable.
- If the package should exist, check AppX deployment logs for registration failures or partial removals.
Get-AppxPackage -AllUsers
Microsoft: Modern, Inbox, and Microsoft Store apps troubleshooting
Microsoft: Windows Update error reference
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