Policy

Configure TPM platform validation profile for native UEFI firmware configurations

Windows 11 25H2

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Policy overview

Key metadata and intent for this policy.

ClassComputer
CategoryWindows Components > BitLocker Drive Encryption > Operating System Drives
Supported onAt least Windows Server 2012, Windows 8 or Windows RT

Supported OS tags: Windows10, Windows10RT, Windows11, Windows8, Windows81, WindowsRT, WindowsRT81, WindowsServer2012, WindowsServer2012R2, WindowsServer2016

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 a native UEFI firmware configuration. Computers with BIOS or UEFI firmware with a Compatibility Service Module (CSM) enabled store different values into the Platform Configuration Registers (PCRs). Use the "Configure TPM platform validation profile for BIOS-based firmware configurations" group policy setting to configure the TPM PCR profile for computers with BIOS configurations or computers with UEFI firmware with a CSM enabled. 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 for the available hardware 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. On PCs that lack Secure Boot State (PCR 7) support, the default platform validation profile secures the encryption key against changes to the core system firmware executable code (PCR 0), extended or pluggable executable code (PCR 2), boot manager (PCR 4), and the BitLocker access control (PCR 11). When Secure Boot State (PCR7) support is available, the default platform validation profile secures the encryption key using Secure Boot State (PCR 7) 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. Specifically, setting this policy with PCR 7 omitted, will override the "Allow Secure Boot for integrity validation" group policy, preventing BitLocker from using Secure Boot for platform or Boot Configuration Data (BCD) integrity validation. Setting this policy may result in BitLocker recovery when firmware is updated. If you set this policy to include PCR 0, suspend BitLocker prior to applying firmware updates. It is recommended to not configure this policy, to allow Windows to select the PCR profile for the best combination of security and usability based on the available hardware on each PC.

Internal name
PlatformValidation_UEFI_Name
Policy ID
4bb07ce555d8
Elements
24

Registry values

How enabled and disabled states update the registry.

Registry locationTypeEnabled valueDisabled value
HKLM\SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_UEFI\EnabledREG_DWORD
1
0

Policy elements

Inputs and configuration options exposed by this policy.

ElementTypeRegistry mappingConstraints & behavior
PCR 0: Core System Firmware executable code
ID PlatformValidation_UEFI_Setting0
boolean
HKLM\SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_UEFI\0
Type REG_DWORD
Options: true (1), false (0)
True: Set value = 1 · False: Set value = 0
PCR 1: Core System Firmware data
ID PlatformValidation_UEFI_Setting1
boolean
HKLM\SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_UEFI\1
Type REG_DWORD
Options: true (1), false (0)
True: Set value = 1 · False: Set value = 0
PCR 2: Extended or pluggable executable code
ID PlatformValidation_UEFI_Setting2
boolean
HKLM\SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_UEFI\2
Type REG_DWORD
Options: true (1), false (0)
True: Set value = 1 · False: Set value = 0
PCR 3: Extended or pluggable firmware data
ID PlatformValidation_UEFI_Setting3
boolean
HKLM\SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_UEFI\3
Type REG_DWORD
Options: true (1), false (0)
True: Set value = 1 · False: Set value = 0
PCR 4: Boot Manager
ID PlatformValidation_UEFI_Setting4
boolean
HKLM\SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_UEFI\4
Type REG_DWORD
Options: true (1), false (0)
True: Set value = 1 · False: Set value = 0
PCR 5: GPT / Partition Table
ID PlatformValidation_UEFI_Setting5
boolean
HKLM\SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_UEFI\5
Type REG_DWORD
Options: true (1), false (0)
True: Set value = 1 · False: Set value = 0
PCR 6: Resume from S4 and S5 Power State Events
ID PlatformValidation_UEFI_Setting6
boolean
HKLM\SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_UEFI\6
Type REG_DWORD
Options: true (1), false (0)
True: Set value = 1 · False: Set value = 0
PCR 7: Secure Boot State
ID PlatformValidation_UEFI_Setting7
boolean
HKLM\SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_UEFI\7
Type REG_DWORD
Options: true (1), false (0)
True: Set value = 1 · False: Set value = 0
PCR 8: Initialized to 0 with no Extends (reserved for future use)
ID PlatformValidation_UEFI_Setting8
boolean
HKLM\SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_UEFI\8
Type REG_DWORD
Options: true (1), false (0)
True: Set value = 1 · False: Set value = 0
PCR 9: Initialized to 0 with no Extends (reserved for future use)
ID PlatformValidation_UEFI_Setting9
boolean
HKLM\SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_UEFI\9
Type REG_DWORD
Options: true (1), false (0)
True: Set value = 1 · False: Set value = 0
PCR 10: Initialized to 0 with no Extends (reserved for future use)
ID PlatformValidation_UEFI_Setting10
boolean
HKLM\SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_UEFI\10
Type REG_DWORD
Options: true (1), false (0)
True: Set value = 1 · False: Set value = 0
PCR 11: BitLocker Access Control
ID PlatformValidation_UEFI_Setting11
boolean
HKLM\SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_UEFI\11
Type REG_DWORD
Options: true (1), false (0)
True: Set value = 1 · False: Set value = 0
PCR 12: Data events and highly volatile events
ID PlatformValidation_UEFI_Setting12
boolean
HKLM\SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_UEFI\12
Type REG_DWORD
Options: true (1), false (0)
True: Set value = 1 · False: Set value = 0
PCR 13: Boot Module Details
ID PlatformValidation_UEFI_Setting13
boolean
HKLM\SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_UEFI\13
Type REG_DWORD
Options: true (1), false (0)
True: Set value = 1 · False: Set value = 0
PCR 14: Boot Authorities
ID PlatformValidation_UEFI_Setting14
boolean
HKLM\SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_UEFI\14
Type REG_DWORD
Options: true (1), false (0)
True: Set value = 1 · False: Set value = 0
PCR 15: Reserved for Future Use
ID PlatformValidation_UEFI_Setting15
boolean
HKLM\SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_UEFI\15
Type REG_DWORD
Options: true (1), false (0)
True: Set value = 1 · False: Set value = 0
PCR 16: Reserved for Future Use
ID PlatformValidation_UEFI_Setting16
boolean
HKLM\SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_UEFI\16
Type REG_DWORD
Options: true (1), false (0)
True: Set value = 1 · False: Set value = 0
PCR 17: Reserved for Future Use
ID PlatformValidation_UEFI_Setting17
boolean
HKLM\SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_UEFI\17
Type REG_DWORD
Options: true (1), false (0)
True: Set value = 1 · False: Set value = 0
PCR 18: Reserved for Future Use
ID PlatformValidation_UEFI_Setting18
boolean
HKLM\SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_UEFI\18
Type REG_DWORD
Options: true (1), false (0)
True: Set value = 1 · False: Set value = 0
PCR 19: Reserved for Future Use
ID PlatformValidation_UEFI_Setting19
boolean
HKLM\SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_UEFI\19
Type REG_DWORD
Options: true (1), false (0)
True: Set value = 1 · False: Set value = 0
PCR 20: Reserved for Future Use
ID PlatformValidation_UEFI_Setting20
boolean
HKLM\SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_UEFI\20
Type REG_DWORD
Options: true (1), false (0)
True: Set value = 1 · False: Set value = 0
PCR 21: Reserved for Future Use
ID PlatformValidation_UEFI_Setting21
boolean
HKLM\SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_UEFI\21
Type REG_DWORD
Options: true (1), false (0)
True: Set value = 1 · False: Set value = 0
PCR 22: Reserved for Future Use
ID PlatformValidation_UEFI_Setting22
boolean
HKLM\SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_UEFI\22
Type REG_DWORD
Options: true (1), false (0)
True: Set value = 1 · False: Set value = 0
PCR 23: Reserved for Future Use
ID PlatformValidation_UEFI_Setting23
boolean
HKLM\SOFTWARE\Policies\Microsoft\FVE\OSPlatformValidation_UEFI\23
Type REG_DWORD
Options: true (1), false (0)
True: Set value = 1 · False: Set value = 0

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