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FVE_E_PIN_PROTECTOR_CHANGE_BY_STD_USER_DISALLOWED
The exact BitLocker condition
FVE_E_PIN_PROTECTOR_CHANGE_BY_STD_USER_DISALLOWED (0x803100A2) identifies the point where policy and authorization context do not permit a standard user to change the PIN through this path. 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.
Never capture PINs, passwords or recovery passwords in logs. IDs, types, policy, call result and attempt counters are sufficient for most diagnosis.
Do not confuse it with a nearby failure
Keep this separate from a wrong PIN or malformed new PIN; the request is rejected before secret validation matters. That distinction determines whether the next check belongs to policy, protector inventory, volume geometry, firmware, account escrow or the calling application's buffer contract.
Evidence that distinguishes the condition
- Record caller token and group membership, UAC elevation, policy controlling standard-user PIN changes and the selected UI/API path.
manage-bde -protectors -get C:
powershell -NoProfile -Command "Get-BitLockerVolume C: | Format-List KeyProtector,ProtectionStatus,VolumeStatus"The rejection is about delegation, not PIN correctness
The standard-user path can be disabled even when the user knows the current PIN and the new PIN meets policy. Capture whether the request used the self-service change UI, an elevated administrator reset, WMI or PowerShell because those paths authorize different principals.
Use the documented elevated reset when immediate recovery is required. If routine self-service changes are intended, change the managed delegation policy consistently across the fleet rather than granting local ad hoc rights.
State checks specific to FVE_E_PIN_PROTECTOR_CHANGE_BY_STD_USER_DISALLOWED
| Stage | How to interpret it |
|---|---|
| Before the call | Record the target identity and the pre-call key-protector lifecycle state. Policy and authorization context do not permit a standard user to change the PIN through this path. |
| At failure | Preserve caller token and group membership, UAC elevation, policy controlling standard-user PIN changes and the selected UI/API path. |
| After correction | Elevate through the documented administrator reset flow or adjust policy centrally if standard-user changes are intended. |
References
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