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NS_E_DRM_BACKUP_CORRUPT
Where the operation stopped
NS_E_DRM_BACKUP_CORRUPT is Windows Media DRM HRESULT 0xC00D2743. It identifies the backup set is incomplete or one of its protected members fails validation. The useful scope is the backup/restore workflow that enumerates eligible licenses, writes a backup set, sends restoration requests to the license-management service and reconciles restored state with the target machine; it is not a generic statement that the media player, network or file system failed, while tracing backup corrupt.
The built-in message summarizes the user-visible outcome, while the symbolic phrase “backup corrupt” preserves the exact WMDRM boundary for diagnosis. For this code, the proof step is to verify the manifest, member list, hashes and source operation ID, for the backup corrupt boundary.
Diagnostic sequence
- Start from
0xC00D2743and map it to the first WMDRM object that returned it, during backup corrupt diagnosis. - separate content/header evidence, license evidence, machine/device evidence and service/network evidence around “backup corrupt”.
- Before retrying this result, check whether another “backup corrupt” operation was active or whether the previous result may have committed partially.
- verify the manifest, member list, hashes and source operation ID, in a backup corrupt incident.
- Apply the smallest supported fix: restore from an intact backup set or create a new backup on the source system; avoid resetting unrelated protected state, for this backup corrupt result.
Evidence worth preserving
Capture the first occurrence before automatic retry, player teardown, store repair or license reacquisition changes the state, when reproducing backup corrupt. The smallest useful record contains:
- Code-specific proof: verify the manifest, member list, hashes and source operation ID,.
- Protected identity: service response, reset count and daily restore limit,.
- Operation state: target machine identity and final license-store commit, while tracing backup corrupt.
- Persistence or transport: backup or restore operation ID, for the boundary.
- Security context: backup directory contents and manifest consistency, during backup corrupt diagnosis.
- Correlation point: per-license backup/restore eligibility, in a incident.
For the “backup corrupt” investigation, use KIDs, license IDs, hashes, certificate thumbprints, sizes and timestamps where possible. While diagnosing this result, do not place content keys, complete license blobs, passwords, cookies or decrypted media in ordinary logs, for this backup corrupt result.
The surrounding protocol and store state
Only licenses carrying the backup/restore right are eligible, and licenses with secure state can be intentionally excluded by the issuer, when reproducing backup corrupt. Backup and restore are multi-stage asynchronous operations; one damaged member or a stale request identifier is not equivalent to an unavailable service,.
Correcting the producing condition
The supported response to this result is narrow: restore from an intact backup set or create a new backup on the source system,. After correcting it, reopen or recreate the object that owned “backup corrupt” so cached state from the failed generation is not mistaken for the repair result.
Representative case: One file from the backup directory was omitted during copying, while tracing backup corrupt.
Related codes and the diagnostic split
| Result | Different boundary |
|---|---|
NS_E_DRM_BACKUPRESTORE_BUSY | A backup or restore operation is already active, for the boundary. |
NS_E_DRM_BACKUP_EXISTS | The selected backup location already contains a WMDRM backup set, during backup corrupt diagnosis. |
NS_E_BACKUP_RESTORE_BAD_DATA | Backup/restore data fails format or integrity validation, in a incident. |
Several values can accompany the “backup corrupt” condition in one incident. Order the result event chain by timestamp and prefer the first code produced at the lowest specific boundary over a later player-level summary, for this backup corrupt result.
Actions that do not prove a fix
- Avoid repeatedly resetting or restoring until anti-fraud limits are reached, when reproducing backup corrupt. That changes evidence without demonstrating why this result was produced.
- Avoid merging files from different backup sets or inventing request identifiers,. That shortcut can create a second store, identity or policy problem,.
- Do not reduce it to “DRM failed” in telemetry; retain the HRESULT, symbolic name, operation and object identity, while tracing backup corrupt.
Regression check
A valid regression for it has two fixtures: one that deliberately produces “the backup set is incomplete or one of its protected members fails validation” and one that applies the targeted correction, for the boundary. Compare callback order, selected license/KID, final rights decision and persistence state; disappearance of the “backup corrupt” dialog alone is not proof.
Code-specific operational note
The symbolic phrase “backup corrupt” is the important search and telemetry key for it. Keep it beside the exact value 0xC00D2743; the official message “One or more backed-up licenses are missing or corrupt, during backup corrupt diagnosis.” is useful to users, but it does not identify the producing API, object generation or protected identity on its own, in a incident.
Technical references
- Backing up and restoring licenses — official Windows Media DRM context for it.
- Backup/restore model and eligibility — API and state rules relevant to this the boundary.
- DRM client interfaces — platform documentation used to distinguish it from adjacent results.
- DRM client structures — official Windows Media DRM context for it.
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