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WU_E_NOT_SUPPORTED
WU_E_NOT_SUPPORTED means the requested functionality is unavailable in the current WUA implementation, operating-system edition, update source, or operation context.
What to check
- Identify the exact API method or update action that returned the code.
- Verify platform, version, and server-selection requirements before adding workarounds.
- Use a supported deployment workflow rather than retrying an unsupported operation.
Find the unsupported capability boundary
This HRESULT is intentionally broader than handler-specific codes. WUA exposes separate interfaces for searching, downloading, installing, service management, and update properties; support can depend on the object, update service, handler, or client version involved in the call. Preserve the exact interface method and the selected service instead of reporting only the HRESULT.
Compare the failing operation with the documented WUA interface contract and, for an update action, inspect the update's installation behavior and handler context. Retrying the same unsupported call cannot add the missing capability. A fallback is valid only when the application explicitly supports a different WUA path or update service and can re-evaluate the update under that path.
References
- Microsoft: Windows Update Agent API
- Microsoft: WUA enumerations
- Microsoft: WUA success and error codes
References
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