What does HRESULT 0xC00D283F (NS_E_DRM_SIGNATURE_FAILURE) mean?

Status / error code:

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Description:

Failed to either create or verify the content header.%0

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NS_E_DRM_NEED_UPGRADE_PD	NS_E_DRM_LICENSE_SERVER_INFO_MISSING

NS_E_DRM_SIGNATURE_FAILURE

Read the code before the dialog

The producer of 0xC00D283F has determined that creation or verification of a protected content header signature failed. NS_E_DRM_SIGNATURE_FAILURE comes from Windows Media DRM client internals, whose state machine implements the client DRM engine that initializes security components, validates content and license identifiers, performs individualization, manages license chains and coordinates protected playback capabilities.

The shortest path to a defensible diagnosis is to capture header bytes/hash, signing certificate identity and cryptographic error. The standard AllStat text is already shown above; this custom section concentrates on the object state and the evidence needed to separate NS_E_DRM_SIGNATURE_FAILURE from neighboring Windows Media errors.

Correlate the owner and the policy

The security decision represented by NS_E_DRM_SIGNATURE_FAILURE depends on DRM component version, KID, content header signature, license chain, uplink license, individualization state, portable-device registrations and local configuration. Record the KID and header hash, DRM component version, individualization status, license-chain identifiers, registry/configuration lookup and the first client callback reporting failure from the same NS_E_DRM_SIGNATURE_FAILURE attempt.

The scope stays narrow: creation or verification of a protected content header signature failed. Other content or actions may still be valid.

Why the first HRESULT matters

For NS_E_DRM_SIGNATURE_FAILURE, reconstruct the transition from the requested action to the rejected condition. The proof step is to capture header bytes/hash, signing certificate identity and cryptographic error; the repaired transition must then correct the signing material or replace the corrupted signed header. Record the first lower-layer status beside NS_E_DRM_SIGNATURE_FAILURE because wrapper HRESULTs can otherwise conceal the producing component.

Minimum evidence set

Field	Value for `NS_E_DRM_SIGNATURE_FAILURE`
Owner	operation, API/callback, object or session identifier, and component/device version associated with NS_E_DRM_SIGNATURE_FAILURE
Direct check	capture header bytes/hash, signing certificate identity and cryptographic error
Policy input	requested action plus the exact license, certificate, profile, output or registration property evaluated by NS_E_DRM_SIGNATURE_FAILURE
Temporal state	trusted/system time, validity interval, request sequence and retry number when they influence NS_E_DRM_SIGNATURE_FAILURE
Lower result	the earliest store, network, cryptographic, driver or provider status preceding the final NS_E_DRM_SIGNATURE_FAILURE wrapper

A controlled reproduction

Preserve NS_E_DRM_SIGNATURE_FAILURE and 0xC00D283F before cleanup, fallback or another media item changes the context.
Run the direct check for NS_E_DRM_SIGNATURE_FAILURE: capture header bytes/hash, signing certificate identity and cryptographic error.
Compare the failure with a known-good case that changes only the property named by this condition: creation or verification of a protected content header signature failed.
Apply the narrow correction for NS_E_DRM_SIGNATURE_FAILURE: correct the signing material or replace the corrupted signed header.
Associate NS_E_DRM_SIGNATURE_FAILURE with its current Windows Media DRM client internals object and the requested action.
Repeat the same action with the same content/device identity and verify that NS_E_DRM_SIGNATURE_FAILURE is not replaced by another policy or trust failure.

The final dialog can be broader

For NS_E_DRM_SIGNATURE_FAILURE, the established fact is that creation or verification of a protected content header signature failed. For NS_E_DRM_SIGNATURE_FAILURE, 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 NS_E_DRM_SIGNATURE_FAILURE as the first specific result. The object and operation attached to NS_E_DRM_SIGNATURE_FAILURE are usually more diagnostic than a later cleanup or user-interface summary.

Contrast with related results

Result	Why it points elsewhere
`NS_E_DRM_NEEDS_UPGRADE_TEMPFILE`	a pending DRM component upgrade depends on a temporary upgrade artifact that cannot be used as expected
`NS_E_DRM_NEED_UPGRADE_PD`	portable-device DRM components require a newer version before protected transfer can continue
`NS_E_DRM_LICENSE_SERVER_INFO_MISSING`	the client cannot read configuration that identifies or describes the license service

Recovery at the right layer

The appropriate operational response is to correct the signing material or replace the corrupted signed header. For NS_E_DRM_SIGNATURE_FAILURE, 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 NS_E_DRM_SIGNATURE_FAILURE, keep this restriction: Do not replace DRM binaries or registry state before recording their versions and signatures; otherwise a component mismatch and a damaged license object become indistinguishable.
Do not alter trusted time, revocation enforcement, certificate validation or output policy merely to suppress NS_E_DRM_SIGNATURE_FAILURE; that bypasses the decision instead of correcting its input.
Retain one failing artifact and one corrected artifact so the resolution of NS_E_DRM_SIGNATURE_FAILURE can be regression-tested.

Re-test the original case

For the final NS_E_DRM_SIGNATURE_FAILURE test, keep the content KID or file hash, requested action, user/account, device identity and output route unchanged wherever they apply. The NS_E_DRM_SIGNATURE_FAILURE case is resolved only when the operation completes without this HRESULT and without a substitute failure from a neighboring license, trust, session or policy check.

Technical references for `NS_E_DRM_SIGNATURE_FAILURE`

Windows Media DRM client interfaces — provides the normative workflow relevant to NS_E_DRM_SIGNATURE_FAILURE.
Digital Rights Management features — lists the security and state transitions used to interpret NS_E_DRM_SIGNATURE_FAILURE.
Licenses and the local license store — defines the platform objects used when diagnosing NS_E_DRM_SIGNATURE_FAILURE.
Windows Media Format SDK error codes — documents the protocol or API boundary behind NS_E_DRM_SIGNATURE_FAILURE.

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