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FVE_E_PROTECTOR_CHANGE_PIN_MISMATCH
The failed prerequisite
FVE_E_PROTECTOR_CHANGE_PIN_MISMATCH / 0x803100A1 marks a rejected BitLocker transition: the current PIN supplied to an in-place change operation does not authenticate the existing PIN protector.
Never capture PINs, passwords or recovery passwords in logs. IDs, types, policy, call result and attempt counters are sufficient for most diagnosis.
Diagnostic map
| Layer | key-protector lifecycle |
|---|---|
| Proof to collect | protector GUID, operation type, failed-attempt count, policy state and whether the user intended change versus administrator reset |
| Different condition | invalid characters in the new PIN or a missing PIN protector |
| First safe change | use the correct current PIN or perform an authorized recovery/reset workflow; do not brute-force repeated changes |
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 focused verification sequence
Recommended operational response
- Use the correct current PIN or perform an authorized recovery/reset workflow; do not brute-force repeated changes.
manage-bde -protectors -get C:
powershell -NoProfile -Command "Get-BitLockerVolume C: | Format-List KeyProtector,ProtectionStatus,VolumeStatus"State checks specific to FVE_E_PROTECTOR_CHANGE_PIN_MISMATCH
| Stage | How to interpret it |
|---|---|
| Before the call | Record the target identity and the pre-call key-protector lifecycle state. The current PIN supplied to an in-place change operation does not authenticate the existing PIN protector. |
| At failure | Preserve protector GUID, operation type, failed-attempt count, policy state and whether the user intended change versus administrator reset. |
Official references
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