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| NS_E_DRM_ENCRYPT_ERROR | NS_E_DRM_LICENSE_INVALID_XML |
NS_E_DRM_DECRYPT_ERROR
This result belongs to the DRM decryption stage: protected media data could not be decrypted with the current header, license and key state.
Evidence worth preserving
- Protected identity: ASF/DRM header bytes and declared version.
- Operation state: KID, license ID and key-selection result.
- Persistence or transport: algorithm, key length and coding object type.
- Security context: signature or certificate validation status.
- Correlation point: first failing sample offset rather than only the player-level message.
Related codes and the diagnostic split
| Result | Different condition |
|---|---|
NS_E_DRM_ENCRYPT_ERROR | WMDRM failed while performing an encryption operation. |
NS_E_DRM_KEY_ERROR | The requested action cannot be performed because a problem occurred with the Windows Media Digital Rights Management (DRM) components on your computer. |
NS_E_DRM_LICENSE_INVALID_XML | The license is corrupted. Acquire a new license. |
Correcting the producing condition
Representative case: The application reaches the decrypt error path and receives this exact HRESULT before the higher-level media action can complete.
Actions that do not prove a fix
- Avoid assuming a codec reinstall can repair a malformed DRM header or a cryptographic key mismatch.
Technical references
- Overview of Windows Media DRM.
- DRM protection and license distribution.
- DRM versions — API and state rules for the DRM operation described here.
- Windows Media DRM error codes.
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