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WU_E_NOOP
WU_E_NOOP means no action was required. It is often a benign result after a request that duplicates current state, such as applying a selection that is already satisfied.
How to handle it
- Treat it separately from an error in automation and reporting.
- Verify the actual update state before retrying; a retry may do nothing again.
- Log the selected updates and operation type so the no-op can be explained to an operator.
Microsoft: WUA success and error codes
Microsoft: IUpdateSearcher::QueryHistory
Microsoft: Windows Update Agent API
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