What does HRESULT 0x80240042 (WU_E_UNKNOWN_SERVICE) mean?

Status / error code:

Category:

Constant name:

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Facility:

Operating System:

Description:

The update service is no longer registered with Automatic Updates.

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WU_E_SYSPREP_IN_PROGRESS	WU_E_NO_UI_SUPPORT

WU_E_UNKNOWN_SERVICE

WU_E_UNKNOWN_SERVICE means the update service selected by the caller is not registered with Automatic Updates anymore. A stale service ID, removed WSUS registration, or policy change can cause this.

What to check

Verify the effective Windows Update and WSUS policy on the device.
Refresh service registration and avoid reusing a service ID that came from an earlier configuration.
Check whether the device was switched between Microsoft Update, WSUS, or another managed update source.

gpresult /h %TEMP%\gpresult.html

Microsoft: Configure Group Policy settings for Automatic Updates

Microsoft: Manage additional Windows Update settings

Microsoft: WUA success and error codes

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