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NS_E_DRM_DEVICE_NOT_REGISTERED
What this HRESULT isolates
When the client returns NS_E_DRM_DEVICE_NOT_REGISTERED (0xC00D27E2), the decisive condition is license policy requires the target device to be registered to this computer. This result belongs to portable-device certificate, secure clock and transfer policy, specifically the device-facing path that authenticates a WMDRM-capable device, obtains its certificate and secure clock, evaluates transfer policy, and records metering or registration state, for the device not registered boundary.
The built-in message summarizes the user-visible outcome, while the symbolic phrase “device not registered” preserves the exact WMDRM boundary for diagnosis. For this code, the proof step is to record device certificate, registration database entry and selected license policy, during device not registered diagnosis.
Minimum incident record
Capture the first occurrence before automatic retry, player teardown, store repair or license reacquisition changes the state, in a device not registered incident. The smallest useful record contains:
- Code-specific proof: record device certificate, registration database entry and selected license policy, for this device not registered result.
- Protected identity: device certificate chain and serial identity, when reproducing device not registered.
- Operation state: secure clock value, source and last successful update,.
- Persistence or transport: requested transfer/burn action and license restriction,.
- Security context: device activation, registration and metering result, while tracing device not registered.
- Correlation point: device model, firmware and WMDRM capability, for the boundary.
For the “device not registered” 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, during device not registered diagnosis.
Triage without destroying evidence
- Start from
0xC00D27E2and map it to the first WMDRM object that returned it, in a incident. - separate content/header evidence, license evidence, machine/device evidence and service/network evidence around “device not registered”.
- Before retrying this result, check whether another “device not registered” operation was active or whether the previous result may have committed partially.
- record device certificate, registration database entry and selected license policy, for this device not registered result.
- Apply the smallest supported fix: complete supported device registration before retrying the operation; avoid resetting unrelated protected state, when reproducing device not registered.
Why the producing layer matters
Two platform rules frame this result. A device can be reachable as storage while still failing WMDRM authentication, secure-clock or policy requirements,. Time-bound and subscription licenses may require a trusted device clock; changing the host clock does not repair a device clock that was never obtained or set,.
Recovery at the right layer
The supported response to it is narrow: complete supported device registration before retrying the operation, while tracing device not registered. After correcting it, reopen or recreate the object that owned “device not registered” so cached state from the failed generation is not mistaken for the repair result.
Representative case: A newly connected device is authenticated but has not been registered for this machine, for the boundary.
Why the symbolic name matters
| Result | Different boundary |
|---|---|
NS_E_DEVICE_NOT_WMDRM_DEVICE | The attached device does not advertise the WMDRM capability required by this transfer, during device not registered diagnosis. |
NS_E_DRM_LIC_NEEDS_DEVICE_CLOCK_SET | The selected license requires a secure device clock that has not been set, in a incident. |
NS_E_DRM_TRANSFER_CHAINED_LICENSES_UNSUPPORTED | The requested device transfer does not support the selected chained-license relationship, for this device not registered result. |
Several values can accompany the “device not registered” 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, when reproducing device not registered.
Shortcuts that make diagnosis worse
- Avoid formatting the device before preserving its certificate, clock and firmware evidence,. That changes evidence without demonstrating why it was produced.
- Avoid treating an unsupported-device result as a generic USB or file-copy failure,. That shortcut can create a second store, identity or policy problem, while tracing device not registered.
- Do not reduce it to “DRM failed” in telemetry; retain the HRESULT, symbolic name, operation and object identity, for the boundary.
Completion criteria
A valid regression for it has two fixtures: one that deliberately produces “license policy requires the target device to be registered to this computer” and one that applies the targeted correction, during device not registered diagnosis. Compare callback order, selected license/KID, final rights decision and persistence state; disappearance of the “device not registered” dialog alone is not proof.
Code-specific operational note
The symbolic phrase “device not registered” is the important search and telemetry key for it. Keep it beside the exact value 0xC00D27E2; the official message “The content owner for the license you just acquired requires your device to register to the current machine, in a incident.” is useful to users, but it does not identify the producing API, object generation or protected identity on its own, for this device not registered result.
Technical references
- IWMDRMDeviceApp interface — official Windows Media DRM context for it.
- Device registration — API and state rules relevant to this the boundary.
- Output protection levels — platform documentation used to distinguish it from adjacent results.
- Windows Media DRM error codes — official Windows Media DRM context for it.
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