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NS_E_WMP_DRM_CORRUPT_BACKUP
The exact DRM boundary
This HRESULT is specific: NS_E_WMP_DRM_CORRUPT_BACKUP appears because the Player restore workflow cannot interpret a usable rights backup set. Within Windows Media Player rights processing, this result is raised while processing the Player layer that opens protected media, queries the local license state, performs silent or interactive rights acquisition, validates DRM components and applies play, burn or sync restrictions.
To prove this boundary rather than infer it from a dialog, inventory the backup files, hashes, creation host and restore-set metadata before retrying.
Fields for a reproducible report
| Field | Value |
|---|---|
| Direct check | inventory the backup files, hashes, creation host and restore-set metadata before retrying |
| Policy input | requested action plus the exact license, certificate, profile, output or registration property evaluated by this result |
| Temporal state | trusted/system time, validity interval, request sequence and retry number when they influence this result |
| Lower result | the earliest store, network, cryptographic, driver or provider status preceding the final it wrapper |
| Owner | operation, API/callback, object or session identifier, and component/device version associated with it |
What to log
It is meaningful only while the following state remains associated with one operation: content KID and header, license-store entry, requested action, acquisition URL, user/store context, secure clock and DRM component generation. Preserve the content KID, requested action, license-state query, acquisition callback sequence, server response category and the first lower-level DRM HRESULT for this HRESULT.
That observation distinguishes it from file corruption because the Player restore workflow cannot interpret a usable rights backup set.
Expected state change
It should be modeled as a failed precondition, not as an arbitrary media exception. Demonstrate the precondition by choosing to inventory the backup files, hashes, creation host and restore-set metadata before retrying, and remove it by choosing to restore from an intact matching backup or reacquire licenses when the issuer permits it. Keeping the result transition intact also shows whether a retry reused stale state or actually reevaluated the corrected input.
Scope and consequences
The established fact is that the Player restore workflow cannot interpret a usable rights backup set. That fact does not independently establish damaged media bytes, a missing decoder, a generally broken network, or invalid rights for every other action.
If the Player, encoder, setup program or device layer later emits a broader error, retain it as the first specific result. The object and operation attached to it are usually more diagnostic than a later cleanup or user-interface summary.
Troubleshooting order
- Preserve it and
0xC00D11B4before cleanup, fallback or another media item changes the context. - Compare the failure with a known-good case that changes only the property named by this condition: the Player restore workflow cannot interpret a usable rights backup set.
- Apply the narrow correction for this HRESULT: restore from an intact matching backup or reacquire licenses when the issuer permits it.
- Associate it with its current Windows Media Player rights processing object and the requested action.
- Run the direct check for this HRESULT: inventory the backup files, hashes, creation host and restore-set metadata before retrying.
- Repeat the same action with the same content/device identity and verify that it is not replaced by another policy or trust failure.
Related codes, different contracts
| Result | Why it points elsewhere |
|---|---|
NS_E_WMG_PREROLLLICENSEACQUISITIONNOTALLOWED | a playlist preroll path attempted license acquisition where the Player does not permit that interactive operation |
NS_E_WMG_LICENSE_TAMPERED | the Player wrapper received evidence that stored media usage rights fail integrity validation |
NS_E_WMP_DRM_LICENSE_SERVER_UNAVAILABLE | the Player cannot reach or complete exchange with the configured license service |
Change the rejected precondition
Correct this layer directly and restore from an intact matching backup or reacquire licenses when the issuer permits it. Success means that the same requested action is accepted after that precise state change, not merely that another file or device happens to work.
- While investigating it, keep this restriction: Do not reset the local DRM store before recording the content KID and license-state result; a reset can turn a precise rights or signature failure into a generic missing-license condition.
- Do not alter trusted time, revocation enforcement, certificate validation or output policy merely to suppress it; that bypasses the decision instead of correcting its input.
- Retain one failing artifact and one corrected artifact so the resolution of it can be regression-tested.
Closure criterion
For the final it test, keep the content KID or file hash, requested action, user/account, device identity and output route unchanged wherever they apply.
Technical references
- Windows Media DRM overview — lists the security and state transitions used to interpret it.
- Acquiring licenses — defines the platform objects used when diagnosing it.
- Licenses and the local license store — documents the protocol or API boundary behind it.
- Windows Media Format SDK error codes — provides the normative workflow relevant to it.
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