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WU_E_AUCLIENT_UNEXPECTED
WU_E_AUCLIENT_UNEXPECTED is a catch-all error from the Automatic Updates client UI layer. It does not identify the root cause by itself; look for the earlier UI, policy, or service message that led to it.
Useful checks
- Determine whether the problem happens only in the Settings UI or also in non-UI WUA operations.
- Review effective Windows Update policy, especially settings that hide or restrict update controls.
- Use the Windows Update log to find the first error before this catch-all result.
Microsoft: Manage additional Windows Update settings
Microsoft: Windows Update log files
Microsoft: WUA success and error codes
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