Policy
Require additional authentication at startup (Windows Server 2008 and Windows Vista)
Microsoft Windows
Policy overview
Key metadata and intent for this policy.
Supported OS tags: WindowsServer2008, WindowsVista
This policy setting allows you to control whether the BitLocker Drive Encryption setup wizard will be able to set up an additional authentication method that is required each time the computer starts. This policy setting is applied when you turn on BitLocker. Note: This policy is only applicable to computers running Windows Server 2008 or Windows Vista. On a computer with a compatible Trusted Platform Module (TPM), two authentication methods can be used at startup to provide added protection for encrypted data. When the computer starts, it can require users to insert a USB flash drive containing a startup key. It can also require users to enter a 4-digit to 20-digit startup personal identification number (PIN). A USB flash drive containing a startup key is needed on computers without a compatible TPM. Without a TPM, BitLocker-encrypted data is protected solely by the key material on this USB flash drive. If you enable this policy setting, the wizard will display the page to allow the user to configure advanced startup options for BitLocker. You can further configure setting options for computers with and without a TPM. If you disable or do not configure this policy setting, the BitLocker setup wizard will display basic steps that allow users to turn on BitLocker on computers with a TPM. In this basic wizard, no additional startup key or startup PIN can be configured.
Registry values
How enabled and disabled states update the registry.
No explicit registry values are set for enabled or disabled states.
Policy elements
Inputs and configuration options exposed by this policy.
| Scope | Element | Type | Registry mapping | Constraints & behavior | Copy |
|---|---|---|---|---|---|
| Computer | Configure TPM startup key: ID ConfigureTPMStartupKeyUsageDropDown_Name | enum | Path SOFTWARE\Policies\Microsoft\FVE Value name UsePartialEncryptionKey Type REG_DWORD | Options: Allow startup key with TPM (2), Require startup key with TPM (1), Do not allow startup key with TPM (0) | |
| Computer | Configure TPM startup PIN: ID ConfigurePINUsageDropDown_Name | enum | Path SOFTWARE\Policies\Microsoft\FVE Value name UsePIN Type REG_DWORD | Options: Allow startup PIN with TPM (2), Require startup PIN with TPM (1), Do not allow startup PIN with TPM (0) | |
| Computer | Allow BitLocker without a compatible TPM (requires a password or a startup key on a USB flash drive) ID ConfigureNonTPMStartupKeyUsage_Name | boolean | Path SOFTWARE\Policies\Microsoft\FVE Value name EnableNonTPM Type REG_DWORD | Options: true (1), false (0) True: Set value = 1 · False: Set value = 0 |