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NS_E_BACKUP_RESTORE_FAILURE
What failed
NS_E_BACKUP_RESTORE_FAILURE (0xC00D272D) is the Windows Media DRM result for a failed license-backup restore. Microsoft documents backup/restore as a multi-stage operation: only eligible licenses can be restored, a service tracks restore activity, and restored state must be committed to the target machine's license store.
Preserve the stage that failed
| Evidence | Diagnostic use |
|---|---|
| Restore request/operation identifier | Separates an active restore from a stale or mismatched service request. |
| Backup-set identity and manifest/file inventory | Shows whether files are missing, mixed between backup sets or already damaged before network exchange. |
| Per-license KID and restore eligibility | Distinguishes a license that is not allowed to be restored from failure of the restore mechanism itself. |
| Service response and reset/limit state | Separates remote restore-policy failures from local license-store commit failures. |
| First local store/secure-store HRESULT | Identifies persistence or machine-binding failure after the service has accepted the operation. |
Use KIDs, operation IDs, hashes and timestamps in logs; do not log content keys, complete license blobs or decrypted media.
Focused investigation
- Determine whether the failure occurs before the restore request is sent, while the service validates it, or while the restored license is committed locally.
- Keep the original backup set unchanged. Mixing files from another backup or inventing request IDs destroys the evidence needed to distinguish corruption from correlation failure.
- If the service identifies one license as ineligible, test another eligible member of the same backup set rather than resetting the whole store.
- If the service succeeds but local commit fails, diagnose the first license-store or secure-store error separately.
Related results
| Result | Different condition |
|---|---|
NS_E_BACKUP_RESTORE_BAD_REQUEST_ID | The restore service cannot correlate the supplied request identifier. |
NS_E_BACKUP_RESTORE_BAD_DATA | The restore request contains invalid backup data. |
NS_E_DRM_BACKUP_CORRUPT | One or more licenses in the backup set are missing or corrupt. |
NS_E_BACKUP_RESTORE_TOO_MANY_RESETS | The restore operation exceeded its reset allowance. |
NS_E_DRM_UNABLE_TO_CREATE_BACKUP_OBJECT | The DRM runtime cannot create the object required to perform backup/restore. |
Verification
Start a fresh restore operation with the unchanged eligible backup set. Confirm that the service accepts the request, the intended licenses are committed to the target store, and a subsequent application instance can use the restored rights. Do not treat disappearance of the top-level HRESULT alone as proof.
Technical references
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