HRESULT 0x8024AFFF (WU_E_AU_UNEXPECTED): meaning and diagnosis

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An unexpected Automatic Updates error occurred that is not covered by a more specific AU error code.

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WU_E_AU_OOBE_IN_PROGRESS	WU_E_WUTASK_INPROGRESS

WU_E_AU_UNEXPECTED

WU_E_AU_UNEXPECTED is the catch-all result for Automatic Updates failures not represented by another WU_E_AU_* code. It is a summary, not the underlying cause.

Best next step

Generate WindowsUpdate.log and find the first concrete error before this result.
Check whether the failure is tied to policy, an update-source change, agent self-update, or an incomplete earlier operation.
Compare a failing client with a working client using the same update management configuration.

Get-WindowsUpdateLog -IncludeAllLogs

Microsoft: Get-WindowsUpdateLog

Microsoft: manage additional Windows Update settings

Microsoft: Windows Update error reference

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