- Open Group Policy Editor:
If Group Policy Editor appearsto be unavailable, follow instructionsfor enabling BitLocker first.
- Open Local Computer Policy > ComputerConfiguration > Administrative Templates > Windows Components> BitLocker Drive Encryption > Operating System Drives.
- Edit Require additionalauthentication at startup policy.
- Set the policy to Enabledand make sure Allow BitLocker withouta compatible TPM is checked.
How to disableTrusted Platform Module (TPM) in BitLocker: