Enable Secure Boot Certificate Deployment: registry value AvailableUpdatesPolicyComputerHKLM\SYSTEM\CurrentControlSet\Control\SecureBoot

Policy ID: SecureBoot_AvailableUpdatesPolicy
Scope: Computer Configuration
Supported on: At least Windows Server 2012, Windows 8 or Windows RT
Source: Administrative Templates (.admx) for Windows 11 2026 Update (26H2) (version 1.0)
Category: Windows Components › Secure Boot

Registry

AvailableUpdatesPolicy

REG_DWORDComputer

HKLM\SYSTEM\CurrentControlSet\Control\SecureBoot Current key

Enabled value: 22852
Disabled value: 0

Apply with .reg · CMD · PowerShell

.reg

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecureBoot]

; Options (use only one)
; Enabled
"AvailableUpdatesPolicy"=dword:00005944
; Disabled
"AvailableUpdatesPolicy"=dword:00000000

CMD

:: Options (use only one)

:: Enabled
reg add "HKLM\SYSTEM\CurrentControlSet\Control\SecureBoot" /v "AvailableUpdatesPolicy" /t REG_DWORD /d 22852 /f
:: Disabled
reg add "HKLM\SYSTEM\CurrentControlSet\Control\SecureBoot" /v "AvailableUpdatesPolicy" /t REG_DWORD /d 0 /f

PowerShell

# Common: create the key
New-Item -Path 'HKLM:\SYSTEM\CurrentControlSet\Control\SecureBoot' -Force | Out-Null

# Options (use only one)
# Enabled
New-ItemProperty -Path 'HKLM:\SYSTEM\CurrentControlSet\Control\SecureBoot' -Name 'AvailableUpdatesPolicy' -PropertyType DWord -Value 22852 -Force | Out-Null
# Disabled
New-ItemProperty -Path 'HKLM:\SYSTEM\CurrentControlSet\Control\SecureBoot' -Name 'AvailableUpdatesPolicy' -PropertyType DWord -Value 0 -Force | Out-Null