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FVE_E_INVALID_PIN_CHARS_DETAILED
Read this as a state-machine result
FVE_E_INVALID_PIN_CHARS_DETAILED is a BitLocker facility HRESULT, not a Win32 filesystem error wrapped by an application. In this case the proposed PIN includes something other than decimal digits 0 through 9 in a numeric-only PIN 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.
What the code does not prove
The closest misleading interpretation is the broader enhanced-PIN compatibility error, which can arise even when characters are allowed by one policy layer. 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 PIN policy, enhanced-PIN setting, input method and keyboard layout without recording the PIN itself.
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.
manage-bde -protectors -get C:
powershell -NoProfile -Command "Get-BitLockerVolume C: | Format-List KeyProtector,ProtectionStatus,VolumeStatus"This path accepts decimal digits only
The detailed variant is useful because it narrows the validation result to characters outside 0 through 9. It can be produced by pasted whitespace, locale-specific digits or punctuation as well as visible letters. Count and classify input characters without recording the secret itself.
If enhanced PINs are desired, verify the corresponding policy and preboot keyboard support before retrying. Otherwise, use an ASCII numeric PIN and confirm the management tool does not append hidden line endings.
State checks specific to FVE_E_INVALID_PIN_CHARS_DETAILED
| Stage | How to interpret it |
|---|---|
| Before the call | Record the target identity and the pre-call key-protector lifecycle state. The proposed PIN includes something other than decimal digits 0 through 9 in a numeric-only PIN path. |
| At failure | Preserve PIN policy, enhanced-PIN setting, input method and keyboard layout without recording the PIN itself. |
| After correction | Enter digits only or enable and validate enhanced PIN support consistently across policy and preboot firmware. |
References
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