Configure the list of blocked TPM commands: registry value BlockedCommandsList_Name (List)ComputerHKLM\SOFTWARE\Policies\Microsoft\Tpm\BlockedCommands\List

Policy ID: BlockedCommandsList_Name
Scope: Computer Configuration
Supported on: At least Windows Vista
Source: Administrative Templates (.admx) for Windows 11 2026 Update (26H2) (version 1.0)
Category: System › Trusted Platform Module Services

Registry

Enabled

REG_DWORDComputer

HKLM\SOFTWARE\Policies\Microsoft\Tpm\BlockedCommands

Enabled value: 1
Disabled value: 0

Apply with .reg · CMD · PowerShell

.reg

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Tpm\BlockedCommands]

; Options (use only one)
; Enabled
"Enabled"=dword:00000001
; Disabled
"Enabled"=dword:00000000

CMD

:: Options (use only one)

:: Enabled
reg add "HKLM\SOFTWARE\Policies\Microsoft\Tpm\BlockedCommands" /v "Enabled" /t REG_DWORD /d 1 /f
:: Disabled
reg add "HKLM\SOFTWARE\Policies\Microsoft\Tpm\BlockedCommands" /v "Enabled" /t REG_DWORD /d 0 /f

PowerShell

# Common: create the key
New-Item -Path 'HKLM:\SOFTWARE\Policies\Microsoft\Tpm\BlockedCommands' -Force | Out-Null

# Options (use only one)
# Enabled
New-ItemProperty -Path 'HKLM:\SOFTWARE\Policies\Microsoft\Tpm\BlockedCommands' -Name 'Enabled' -PropertyType DWord -Value 1 -Force | Out-Null
# Disabled
New-ItemProperty -Path 'HKLM:\SOFTWARE\Policies\Microsoft\Tpm\BlockedCommands' -Name 'Enabled' -PropertyType DWord -Value 0 -Force | Out-Null

(list values)

REG_SZComputer

HKLM\SOFTWARE\Policies\Microsoft\Tpm\BlockedCommands\List Current key

Enabled value: Depends on the option value
Element: The list of blocked TPM commands:
Value type: REG_SZ
Add to existing value: true

Apply with .reg · CMD · PowerShell

.reg

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Tpm\BlockedCommands\List]
"<enter value>"="<enter value>"

CMD

reg add "HKLM\SOFTWARE\Policies\Microsoft\Tpm\BlockedCommands\List" /v "<enter value>" /t REG_SZ /d "<enter value>" /f

PowerShell

New-Item -Path 'HKLM:\SOFTWARE\Policies\Microsoft\Tpm\BlockedCommands\List' -Force | Out-Null
New-ItemProperty -Path 'HKLM:\SOFTWARE\Policies\Microsoft\Tpm\BlockedCommands\List' -Name '<enter value>' -PropertyType String -Value '<enter value>' -Force | Out-Null