Operating system drive encryption settings

This policy setting allows you to manage whether the operating system drive must be encrypted or not.

For higher security, when enabled with TPM + PIN protector, you may consider disable the following policies in System/Power Management/Sleep Settings:
Allow Standby States (S1-S3) When Sleeping (Plugged In)
Allow Standby States (S1-S3) When Sleeping (On Battery)

If you want to use BitLocker on a computer without a TPM, select the "Allow BitLocker without a compatible TPM" check box (supported on Windows 8 or higher). In this mode a password is required for start-up. If you forget the password then you will need to use one of the BitLocker recovery options to access the drive.

On a computer with a compatible TPM, two types of authentication methods can be used at startup to provide added protection for encrypted data. When the computer starts, it can use only the TPM for authentication, or it can also require the entry of a 4-digit to 20-digit personal identification number (PIN).

If you enable this policy setting, the user will have to put the operation system drive under BitLocker protection and drive will be encrypted.

If you disable this policy, the user will not be able to put the operating system drive under BitLocker protection. Note that applying this policy after the operating system drive is encrypted will result in its decryption.

If you do not configure this policy, then it is not required to put the operating system drive under BitLocker protection.

Allow BitLocker without a compatible TPM (requires a password)

Registry Hive	HKEY_LOCAL_MACHINE
Registry Path	SOFTWARE\Policies\Microsoft\FVE
Value Name	EnableBDEWithNoTPM
Value Type	REG_DWORD
Default Value	1
True Value	1
False Value	0

Select protector for operating system drive:

0. TPM only
   

   Registry Hive	HKEY_LOCAL_MACHINE
   Registry Path	SOFTWARE\Policies\Microsoft\FVE\MDOPBitLockerManagement
   Value Name	OSDriveProtector
   Value Type	REG_DWORD
   Value	1

   Registry Hive	Registry Path:	Value Name	Value Type	Value
   HKEY_LOCAL_MACHINE	SOFTWARE\Policies\Microsoft\FVE\MDOPBitLockerManagement	DisallowStandardUserPINReset	REG_DWORD	1
   HKEY_LOCAL_MACHINE	SOFTWARE\Policies\Microsoft\FVE\MDOPBitLockerManagement	UsePartialEncryptionKey	REG_DWORD	2
   HKEY_LOCAL_MACHINE	SOFTWARE\Policies\Microsoft\FVE\MDOPBitLockerManagement	UsePIN	REG_DWORD	2
   HKEY_LOCAL_MACHINE	SOFTWARE\Policies\Microsoft\FVE\MDOPBitLockerManagement	UseAdvancedStartup	REG_DWORD	1
   HKEY_LOCAL_MACHINE	SOFTWARE\Policies\Microsoft\FVE\MDOPBitLockerManagement	UseTPM	REG_DWORD	2
   HKEY_LOCAL_MACHINE	SOFTWARE\Policies\Microsoft\FVE\MDOPBitLockerManagement	UseTPMKey	REG_DWORD	2
   HKEY_LOCAL_MACHINE	SOFTWARE\Policies\Microsoft\FVE\MDOPBitLockerManagement	UseTPMPIN	REG_DWORD	2
   HKEY_LOCAL_MACHINE	SOFTWARE\Policies\Microsoft\FVE\MDOPBitLockerManagement	UseTPMKeyPIN	REG_DWORD	2

1. TPM and PIN
   

   Registry Hive	HKEY_LOCAL_MACHINE
   Registry Path	SOFTWARE\Policies\Microsoft\FVE\MDOPBitLockerManagement
   Value Name	OSDriveProtector
   Value Type	REG_DWORD
   Value	4

   Registry Hive	Registry Path:	Value Name	Value Type	Value
   HKEY_LOCAL_MACHINE	SOFTWARE\Policies\Microsoft\FVE\MDOPBitLockerManagement	DisallowStandardUserPINReset	REG_DWORD	1
   HKEY_LOCAL_MACHINE	SOFTWARE\Policies\Microsoft\FVE\MDOPBitLockerManagement	UsePartialEncryptionKey	REG_DWORD	2
   HKEY_LOCAL_MACHINE	SOFTWARE\Policies\Microsoft\FVE\MDOPBitLockerManagement	UsePIN	REG_DWORD	2
   HKEY_LOCAL_MACHINE	SOFTWARE\Policies\Microsoft\FVE\MDOPBitLockerManagement	UseAdvancedStartup	REG_DWORD	1
   HKEY_LOCAL_MACHINE	SOFTWARE\Policies\Microsoft\FVE\MDOPBitLockerManagement	UseTPM	REG_DWORD	2
   HKEY_LOCAL_MACHINE	SOFTWARE\Policies\Microsoft\FVE\MDOPBitLockerManagement	UseTPMKey	REG_DWORD	2
   HKEY_LOCAL_MACHINE	SOFTWARE\Policies\Microsoft\FVE\MDOPBitLockerManagement	UseTPMPIN	REG_DWORD	2
   HKEY_LOCAL_MACHINE	SOFTWARE\Policies\Microsoft\FVE\MDOPBitLockerManagement	UseTPMKeyPIN	REG_DWORD	2

Settings for computers with a TPM:

Configure minimum PIN length for startup

Registry Hive	HKEY_LOCAL_MACHINE
Registry Path	Software\Policies\Microsoft\FVE
Value Name	MinimumPIN
Value Type	REG_DWORD
Default Value	4
Min Value	4
Max Value	20