NS_E_DRM_LICENSE_DELETION_ERROR: meaning and diagnosis

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Description:

License deletion did not work. Contact Microsoft product support.%0

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NS_E_DRM_UNSUPPORTED_ALGORITHM	NS_E_DRM_INVALID_CERTIFICATE

NS_E_DRM_LICENSE_DELETION_ERROR

Failure scope

For NS_E_DRM_LICENSE_DELETION_ERROR, the failed contract is that the DRM engine failed while removing a license from its managed store. Diagnosis of this result therefore starts in Windows Media DRM client internals, the layer responsible for the client DRM engine that initializes security components, validates content and license identifiers, performs individualization, manages license chains and coordinates protected playback capabilities.

A useful test is to record license ID, store transaction result and file/permission state.

Data worth retaining

Do not separate this result from its owning state: DRM component version, KID, content header signature, license chain, uplink license, individualization state, portable-device registrations and local configuration. The diagnostic record is the KID and header hash, DRM component version, individualization status, license-chain identifiers, registry/configuration lookup and the first client callback reporting failure.

The producing layer has not made a claim about every media operation; it has only established that the DRM engine failed while removing a license from its managed store.

Test without erasing evidence

Preserve this result and 0xC00D284E before cleanup, fallback or another media item changes the context.
Associate it with its current Windows Media DRM client internals object and the requested action.
Run the direct check: record license ID, store transaction result and file/permission state.
Compare the failure with a known-good case that changes only the property named by this condition: the DRM engine failed while removing a license from its managed store.
Apply the targeted fix: repair store access/integrity and repeat deletion through the license-management API.

The transition to retest

A useful failure model links cause and recovery: the DRM engine failed while removing a license from its managed store. Verify that model when you record license ID, store transaction result and file/permission state, then make the smallest change needed to repair store access/integrity and repeat deletion through the license-management API. Keeping the result transition intact also shows whether a retry reused stale state or actually reevaluated the corrected input.

Separate cause from wrapper

The DRM engine failed while removing a license from its managed store.

Verification inputs

Field	Value
Direct check	record license ID, store transaction result and file/permission state

Different owners, similar dialog

Result	Why it points elsewhere
`NS_E_DRM_CHAIN_TOO_LONG`	a proposed chained license uses another chained license as its uplink, exceeding the supported chain depth
`NS_E_DRM_UNSUPPORTED_ALGORITHM`	the protected object names a cryptographic algorithm the client does not implement
`NS_E_DRM_LICENSE_INITIALIZATION_ERROR`	the DRM engine could not initialize the license object or license subsystem for this operation

When a retry is valid

Recovery should change the failed precondition by choosing to repair store access/integrity and repeat deletion through the license-management API.

Preserve the evidence before making changes.

Technical references

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