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WU_E_AU_NO_REGISTERED_SERVICE
WU_E_AU_NO_REGISTERED_SERVICE means Automatic Updates has no unmanaged update service registered for the request. This is relevant when software registers or unregisters update services programmatically.
What to check
- For WUA-based software, enumerate the registered services and confirm that the intended service is still present.
- Do not remove or replace a service registration while an Automatic Updates request is active.
- For an ordinary endpoint, treat this as a configuration clue and inspect the managed update-source settings first.
Get-WindowsUpdateLogMicrosoft: IUpdateServiceManager interface
Microsoft: manage additional Windows Update settings
Microsoft: Windows Update error reference
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