Error While Validating Security Key Error Code 233 ❲2026 Edition❳

HKLM\SOFTWARE\Microsoft\Cryptography\Defaults\Provider\Microsoft Smart Card Key Storage Provider Type = 0 (REG_DWORD) Run these in an elevated PowerShell:

Restart-Service -Name "Smart Card Device Enumeration Service" Restart-Service -Name "Certificate Propagation" Restart-Service -Name "KeyIso" # CNG Key Isolation Remove, wait 10 seconds, reinsert the smart card / USB security key. 4. Scenario-Specific Fixes 🔹 Scenario A: BitLocker TPM validation error Fix – Clear and reset TPM: error while validating security key error code 233