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FVE_E_NO_EXISTING_PIN
Why this is not a generic disk error
The practical meaning of FVE_E_NO_EXISTING_PIN is that a PIN change or reset was requested but the volume has no existing PIN-based protector. The HRESULT is 0x803100A0.
Three decisions before remediation
- Is the result target correct?
- Use the volume or protector GUID and confirm its role; do not rely only on a drive letter or friendly name.
- Is the result request allowed?
- Resolve effective policy, Windows edition, caller token and management source for the key-protector lifecycle operation.
- Is the result state stable?
- Record conversion, protection, lock and reboot status before modifying anything.
A BitLocker key protector wraps access to the volume master key. TPM, TPM+PIN, startup key, recovery password, password, certificate and Network Unlock protectors have different volume and policy rules; changing one is not the same as decrypting the volume. A change operation authenticates the old protector and creates replacement wrapping data. An administrator reset follows a different trust path, which is why change and reset errors must not be merged.
Why a common workaround is wrong
This should not be diagnosed as an incorrect current PIN; there is no PIN protector here to authenticate against. That nearby condition needs a different corrective action and may produce a similar user-facing message.
Confirm the returning layer
manage-bde -protectors -get C:
powershell -NoProfile -Command "Get-BitLockerVolume C: | Format-List KeyProtector,ProtectionStatus,VolumeStatus"Correct the configuration deliberately
- Add an approved PIN-based protector or select the correct existing protector instead of retrying a change operation.
Change and add are different protector operations
A PIN change API preserves the identity of an existing PIN-based protector while replacing its authentication data. If the volume has TPM-only, startup-key or recovery protectors but no PIN protector, there is nothing for that method to change. The correct inventory is the protector GUID and type, not a UI assumption that “BitLocker uses the TPM.”
Add a supported TPM+PIN protector only after policy and recovery escrow are verified. Do not delete the TPM-only protector until the intended transition has been tested.
State checks specific to FVE_E_NO_EXISTING_PIN
| Stage | How to interpret it |
|---|---|
| Before the call | Record the target identity and the pre-call key-protector lifecycle state. A PIN change or reset was requested but the volume has no existing PIN-based protector. |
| At failure | Preserve protector GUIDs and types, target volume, requested ChangePIN operation and whether a different startup protector is present. |
References
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