Policy
Configure TPM platform validation profile for BIOS-based firmware configurations
Microsoft Windows
Policy overview
Key metadata and intent for this policy.
Supported OS tags: Windows8, WindowsServer2012
This policy setting allows you to configure how the computer's Trusted Platform Module (TPM) security hardware secures the BitLocker encryption key. This policy setting does not apply if the computer does not have a compatible TPM or if BitLocker has already been turned on with TPM protection. Important: This group policy only applies to computers with BIOS configurations or to computers with UEFI firmware with a Compatibility Service Module (CSM) enabled. Computers using a native UEFI firmware configuration store different values into the Platform Configuration Registers (PCRs). Use the "Configure TPM platform validation profile for native UEFI firmware configurations" group policy setting to configure the TPM PCR profile for computers using native UEFI firmware. If you enable this policy setting before turning on BitLocker, you can configure the boot components that the TPM will validate before unlocking access to the BitLocker-encrypted operating system drive. If any of these components change while BitLocker protection is in effect, the TPM will not release the encryption key to unlock the drive and the computer will instead display the BitLocker Recovery console and require that either the recovery password or recovery key be provided to unlock the drive. If you disable or do not configure this policy setting, BitLocker uses the default platform validation profile or the platform validation profile specified by the setup script. A platform validation profile consists of a set of Platform Configuration Register (PCR) indices ranging from 0 to 23. The default platform validation profile secures the encryption key against changes to the Core Root of Trust of Measurement (CRTM), BIOS, and Platform Extensions (PCR 0), the Option ROM Code (PCR 2), the Master Boot Record (MBR) Code (PCR 4), the NTFS Boot Sector (PCR 8), the NTFS Boot Block (PCR 9), the Boot Manager (PCR 10), and the BitLocker Access Control (PCR 11). Warning: Changing from the default platform validation profile affects the security and manageability of your computer. BitLocker's sensitivity to platform modifications (malicious or authorized) is increased or decreased depending upon inclusion or exclusion (respectively) of the PCRs.
Internal name
PlatformValidation_BIOS_Name
Policy ID
3a911b04e77e
Elements
24
Registry values
How enabled and disabled states update the registry.
| Scope | Registry location | Type | Enabled value | Disabled value | Copy |
|---|---|---|---|---|---|
| Computer | Path SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_BIOS Value name Enabled | REG_DWORD | HKLM 1 | HKLM 0 |
Registry location
Path
SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_BIOS
Value name
Enabled
Hive
HKLM
Enabled value
1
Disabled value
0
Policy elements
Inputs and configuration options exposed by this policy.
| Scope | Element | Type | Registry mapping | Constraints & behavior | Copy |
|---|---|---|---|---|---|
| Computer | PCR 0: Core Root of Trust of Measurement (CRTM), BIOS, and Platform Extensions ID PlatformValidation_BIOS_Setting0 | boolean | Path SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_BIOS Value name 0 Type REG_DWORD | Options: true (1), false (0) True: Set value = 1 · False: Set value = 0 | |
| Computer | PCR 1: Platform and Motherboard Configuration and Data ID PlatformValidation_BIOS_Setting1 | boolean | Path SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_BIOS Value name 1 Type REG_DWORD | Options: true (1), false (0) True: Set value = 1 · False: Set value = 0 | |
| Computer | PCR 2: Option ROM Code ID PlatformValidation_BIOS_Setting2 | boolean | Path SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_BIOS Value name 2 Type REG_DWORD | Options: true (1), false (0) True: Set value = 1 · False: Set value = 0 | |
| Computer | PCR 3: Option ROM Configuration and Data ID PlatformValidation_BIOS_Setting3 | boolean | Path SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_BIOS Value name 3 Type REG_DWORD | Options: true (1), false (0) True: Set value = 1 · False: Set value = 0 | |
| Computer | PCR 4: Master Boot Record (MBR) Code ID PlatformValidation_BIOS_Setting4 | boolean | Path SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_BIOS Value name 4 Type REG_DWORD | Options: true (1), false (0) True: Set value = 1 · False: Set value = 0 | |
| Computer | PCR 5: Master Boot Record (MBR) Partition Table ID PlatformValidation_BIOS_Setting5 | boolean | Path SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_BIOS Value name 5 Type REG_DWORD | Options: true (1), false (0) True: Set value = 1 · False: Set value = 0 | |
| Computer | PCR 6: State Transition and Wake Events ID PlatformValidation_BIOS_Setting6 | boolean | Path SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_BIOS Value name 6 Type REG_DWORD | Options: true (1), false (0) True: Set value = 1 · False: Set value = 0 | |
| Computer | PCR 7: Computer Manufacturer-Specific ID PlatformValidation_BIOS_Setting7 | boolean | Path SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_BIOS Value name 7 Type REG_DWORD | Options: true (1), false (0) True: Set value = 1 · False: Set value = 0 | |
| Computer | PCR 8: NTFS Boot Sector ID PlatformValidation_BIOS_Setting8 | boolean | Path SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_BIOS Value name 8 Type REG_DWORD | Options: true (1), false (0) True: Set value = 1 · False: Set value = 0 | |
| Computer | PCR 9: NTFS Boot Block ID PlatformValidation_BIOS_Setting9 | boolean | Path SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_BIOS Value name 9 Type REG_DWORD | Options: true (1), false (0) True: Set value = 1 · False: Set value = 0 | |
| Computer | PCR 10: Boot Manager ID PlatformValidation_BIOS_Setting10 | boolean | Path SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_BIOS Value name 10 Type REG_DWORD | Options: true (1), false (0) True: Set value = 1 · False: Set value = 0 | |
| Computer | PCR 11: BitLocker Access Control ID PlatformValidation_BIOS_Setting11 | boolean | Path SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_BIOS Value name 11 Type REG_DWORD | Options: true (1), false (0) True: Set value = 1 · False: Set value = 0 | |
| Computer | PCR 12: Reserved for Future Use ID PlatformValidation_BIOS_Setting12 | boolean | Path SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_BIOS Value name 12 Type REG_DWORD | Options: true (1), false (0) True: Set value = 1 · False: Set value = 0 | |
| Computer | PCR 13: Reserved for Future Use ID PlatformValidation_BIOS_Setting13 | boolean | Path SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_BIOS Value name 13 Type REG_DWORD | Options: true (1), false (0) True: Set value = 1 · False: Set value = 0 | |
| Computer | PCR 14: Reserved for Future Use ID PlatformValidation_BIOS_Setting14 | boolean | Path SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_BIOS Value name 14 Type REG_DWORD | Options: true (1), false (0) True: Set value = 1 · False: Set value = 0 | |
| Computer | PCR 15: Reserved for Future Use ID PlatformValidation_BIOS_Setting15 | boolean | Path SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_BIOS Value name 15 Type REG_DWORD | Options: true (1), false (0) True: Set value = 1 · False: Set value = 0 | |
| Computer | PCR 16: Reserved for Future Use ID PlatformValidation_BIOS_Setting16 | boolean | Path SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_BIOS Value name 16 Type REG_DWORD | Options: true (1), false (0) True: Set value = 1 · False: Set value = 0 | |
| Computer | PCR 17: Reserved for Future Use ID PlatformValidation_BIOS_Setting17 | boolean | Path SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_BIOS Value name 17 Type REG_DWORD | Options: true (1), false (0) True: Set value = 1 · False: Set value = 0 | |
| Computer | PCR 18: Reserved for Future Use ID PlatformValidation_BIOS_Setting18 | boolean | Path SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_BIOS Value name 18 Type REG_DWORD | Options: true (1), false (0) True: Set value = 1 · False: Set value = 0 | |
| Computer | PCR 19: Reserved for Future Use ID PlatformValidation_BIOS_Setting19 | boolean | Path SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_BIOS Value name 19 Type REG_DWORD | Options: true (1), false (0) True: Set value = 1 · False: Set value = 0 | |
| Computer | PCR 20: Reserved for Future Use ID PlatformValidation_BIOS_Setting20 | boolean | Path SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_BIOS Value name 20 Type REG_DWORD | Options: true (1), false (0) True: Set value = 1 · False: Set value = 0 | |
| Computer | PCR 21: Reserved for Future Use ID PlatformValidation_BIOS_Setting21 | boolean | Path SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_BIOS Value name 21 Type REG_DWORD | Options: true (1), false (0) True: Set value = 1 · False: Set value = 0 | |
| Computer | PCR 22: Reserved for Future Use ID PlatformValidation_BIOS_Setting22 | boolean | Path SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_BIOS Value name 22 Type REG_DWORD | Options: true (1), false (0) True: Set value = 1 · False: Set value = 0 | |
| Computer | PCR 23: Reserved for Future Use ID PlatformValidation_BIOS_Setting23 | boolean | Path SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_BIOS Value name 23 Type REG_DWORD | Options: true (1), false (0) True: Set value = 1 · False: Set value = 0 |
PCR 0: Core Root of Trust of Measurement (CRTM), BIOS, and Platform Extensions
Registry mapping
Path
SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_BIOS
Value name
0
Type
REG_DWORD
Details
Options: true (1), false (0)
True: Set value = 1 · False: Set value = 0
PCR 1: Platform and Motherboard Configuration and Data
Registry mapping
Path
SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_BIOS
Value name
1
Type
REG_DWORD
Details
Options: true (1), false (0)
True: Set value = 1 · False: Set value = 0
PCR 2: Option ROM Code
Registry mapping
Path
SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_BIOS
Value name
2
Type
REG_DWORD
Details
Options: true (1), false (0)
True: Set value = 1 · False: Set value = 0
PCR 3: Option ROM Configuration and Data
Registry mapping
Path
SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_BIOS
Value name
3
Type
REG_DWORD
Details
Options: true (1), false (0)
True: Set value = 1 · False: Set value = 0
PCR 4: Master Boot Record (MBR) Code
Registry mapping
Path
SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_BIOS
Value name
4
Type
REG_DWORD
Details
Options: true (1), false (0)
True: Set value = 1 · False: Set value = 0
PCR 5: Master Boot Record (MBR) Partition Table
Registry mapping
Path
SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_BIOS
Value name
5
Type
REG_DWORD
Details
Options: true (1), false (0)
True: Set value = 1 · False: Set value = 0
PCR 6: State Transition and Wake Events
Registry mapping
Path
SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_BIOS
Value name
6
Type
REG_DWORD
Details
Options: true (1), false (0)
True: Set value = 1 · False: Set value = 0
PCR 7: Computer Manufacturer-Specific
Registry mapping
Path
SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_BIOS
Value name
7
Type
REG_DWORD
Details
Options: true (1), false (0)
True: Set value = 1 · False: Set value = 0
PCR 8: NTFS Boot Sector
Registry mapping
Path
SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_BIOS
Value name
8
Type
REG_DWORD
Details
Options: true (1), false (0)
True: Set value = 1 · False: Set value = 0
PCR 9: NTFS Boot Block
Registry mapping
Path
SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_BIOS
Value name
9
Type
REG_DWORD
Details
Options: true (1), false (0)
True: Set value = 1 · False: Set value = 0
PCR 10: Boot Manager
Registry mapping
Path
SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_BIOS
Value name
10
Type
REG_DWORD
Details
Options: true (1), false (0)
True: Set value = 1 · False: Set value = 0
PCR 11: BitLocker Access Control
Registry mapping
Path
SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_BIOS
Value name
11
Type
REG_DWORD
Details
Options: true (1), false (0)
True: Set value = 1 · False: Set value = 0
PCR 12: Reserved for Future Use
Registry mapping
Path
SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_BIOS
Value name
12
Type
REG_DWORD
Details
Options: true (1), false (0)
True: Set value = 1 · False: Set value = 0
PCR 13: Reserved for Future Use
Registry mapping
Path
SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_BIOS
Value name
13
Type
REG_DWORD
Details
Options: true (1), false (0)
True: Set value = 1 · False: Set value = 0
PCR 14: Reserved for Future Use
Registry mapping
Path
SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_BIOS
Value name
14
Type
REG_DWORD
Details
Options: true (1), false (0)
True: Set value = 1 · False: Set value = 0
PCR 15: Reserved for Future Use
Registry mapping
Path
SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_BIOS
Value name
15
Type
REG_DWORD
Details
Options: true (1), false (0)
True: Set value = 1 · False: Set value = 0
PCR 16: Reserved for Future Use
Registry mapping
Path
SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_BIOS
Value name
16
Type
REG_DWORD
Details
Options: true (1), false (0)
True: Set value = 1 · False: Set value = 0
PCR 17: Reserved for Future Use
Registry mapping
Path
SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_BIOS
Value name
17
Type
REG_DWORD
Details
Options: true (1), false (0)
True: Set value = 1 · False: Set value = 0
PCR 18: Reserved for Future Use
Registry mapping
Path
SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_BIOS
Value name
18
Type
REG_DWORD
Details
Options: true (1), false (0)
True: Set value = 1 · False: Set value = 0
PCR 19: Reserved for Future Use
Registry mapping
Path
SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_BIOS
Value name
19
Type
REG_DWORD
Details
Options: true (1), false (0)
True: Set value = 1 · False: Set value = 0
PCR 20: Reserved for Future Use
Registry mapping
Path
SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_BIOS
Value name
20
Type
REG_DWORD
Details
Options: true (1), false (0)
True: Set value = 1 · False: Set value = 0
PCR 21: Reserved for Future Use
Registry mapping
Path
SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_BIOS
Value name
21
Type
REG_DWORD
Details
Options: true (1), false (0)
True: Set value = 1 · False: Set value = 0
PCR 22: Reserved for Future Use
Registry mapping
Path
SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_BIOS
Value name
22
Type
REG_DWORD
Details
Options: true (1), false (0)
True: Set value = 1 · False: Set value = 0
PCR 23: Reserved for Future Use
Registry mapping
Path
SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_BIOS
Value name
23
Type
REG_DWORD
Details
Options: true (1), false (0)
True: Set value = 1 · False: Set value = 0