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WU_E_SERVICE_NOT_REGISTERED
WU_E_SERVICE_NOT_REGISTERED means the update service referenced by the operation is not registered on the client. A service can be absent because policy switched the device to a different source, registration was removed, or the caller used a stale ID.
What to do
- Verify the effective update source and policy before attempting to recreate registrations manually.
- Refresh the WUA service list and search result after a source or policy change.
- For WSUS clients, confirm that the configured server endpoints and policy settings are consistent.
Microsoft: Configure Group Policy settings for Automatic Updates
Microsoft: Manage additional Windows Update settings
Microsoft: WUA update-service enumerations
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