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NS_S_WMPBR_SUCCESS
Windows Media backup or restore completed successfully
NS_S_WMPBR_SUCCESS is HRESULT 856373 (0x000D1135) from Windows Media. AllStat describes it as “Backup or Restore successful!” In the Windows Media Player, Windows Media Format, DRM, or Media Foundation state machine, the value reports a nonfailure state that must not be collapsed into plain S_OK.
Accepting this result requires proving the documented state rather than checking only SUCCEEDED(hr).
Where the status is encountered
- Windows Media Player library, playlist, store, or UI plug-in callbacks; capture the exact API, object, and phase because the same numeric success severity does not define the state by itself.
- Windows Media Format source, writer, DRM, publishing-point, or installation operations;
- Media Foundation topology activation and remote-component setup;
Keep it attached to the operation that returned it. Interpreting it outside that API contract can turn a normal continuation or partial result into an incorrect retry or false completion.
What must be true before accepting it
Verify that all selected rights, metadata, and backup artifacts passed post-operation verification rather than relying only on the success status. The boundary determines whether the caller continues, waits, falls back, or ends the operation.
Also confirm that returned outputs belong to the current operation generation and were not inherited from an earlier attempt.
Difference from nearby results
NS_S_WMPBR_PARTIALSUCCESS reports limitations; it says the selected backup or restore scope completed without those omissions.
The neighboring result changes whether output is final, more work remains, or fallback is required.
Correct handling and recovery
Finalize the operation, verify inventory counts and destination readability, and record the backup set identity. Keep recovery material protected as sensitive data.
Do not use an unchanged tight retry loop for this HRESULT; it can duplicate effects or conceal a terminal state.
Practical scenario
A rights backup finishes and the application verifies the manifest, file count, and restore test before rotating the previous protected backup.
References
- Microsoft: Windows Media Format SDK error and success codes
- Microsoft: Windows Media Player SDK
- Microsoft: Media Foundation SDK
- Microsoft: HRESULT values
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