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FVE_E_DE_FIXED_DATA_NOT_SUPPORTED
Read this as a state-machine result
FVE_E_DE_FIXED_DATA_NOT_SUPPORTED is a BitLocker facility HRESULT, not a Win32 filesystem error wrapped by an application. In this case automatic Device Encryption cannot establish its device-wide posture while an unsupported or unencrypted fixed data volume is present.
Automatic Device Encryption is a provisioning and compliance workflow layered on BitLocker. It evaluates platform eligibility, account-backed recovery escrow, all applicable fixed volumes and protection state; failure of Auto-DE does not automatically mean manual BitLocker is unavailable.
What the code does not prove
The closest misleading interpretation is a removable drive or an ordinary BitLocker manual configuration on one volume. Verify the returning method and state transition before assigning the incident to disk corruption, TPM failure or bad credentials.
Inspect the target, not just the message
- Record all fixed-disk inventory, bus and media type, support status, encryption/protection state and policy scope.
Evaluate every fixed volume and the OS trust anchor together. Automatic unlock and device-wide compliance can fail because a secondary volume is outside policy.
msinfo32.exe
powershell -NoProfile -Command "Get-BitLockerVolume | Format-Table MountPoint,VolumeType,VolumeStatus,ProtectionStatus"State checks specific to FVE_E_DE_FIXED_DATA_NOT_SUPPORTED
| Stage | How to interpret it |
|---|---|
| Before the call | Record the target identity and the pre-call automatic Device Encryption state. Automatic Device Encryption cannot establish its device-wide posture while an unsupported or unencrypted fixed data volume is present. |
| At failure | Preserve all fixed-disk inventory, bus and media type, support status, encryption/protection state and policy scope. |
| After correction | Encrypt or remove the incompatible fixed-data configuration through a supported design before reevaluating automatic device encryption. |
References
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