| Previous | Next |
| TPM_E_KEY_NOT_SIGNING_KEY | TPM_E_CLAIM_TYPE_NOT_SUPPORTED |
TPM_E_LOCKED_OUT
TPM_E_LOCKED_OUT means the TPM has entered an authorization lockout state, normally as anti-hammering protection after too many failed authorization attempts.
What to check
- Stop repeated attempts and identify the incorrect authorization source, PIN, or policy.
- Check the device lockout state and use the organization-approved TPM recovery process.
- Do not clear the TPM just to make retries possible; clearing removes TPM-resident keys and can cause BitLocker or identity recovery work.
Get-TpmMicrosoft: TPM Group Policy settings
Microsoft: Troubleshoot the TPM
Looking for a different code? Search another status or error code.