Approved Installation Sites for ActiveX Controls: registry value ApprovedActiveXInstallSites (ApprovedActiveXInstallSites)ComputerHKLM\SOFTWARE\Policies\Microsoft\Windows\AxInstaller\ApprovedActiveXInstallSites

Policy ID: ApprovedActiveXInstallSites
Scope: Computer Configuration
Supported on: At least Windows Vista
Source: Administrative Templates (.admx) for Windows 11 2026 Update (26H2) (version 1.0)
Category: Windows Components › ActiveX Installer Service

Registry

ApprovedList

REG_DWORDComputer

HKLM\SOFTWARE\Policies\Microsoft\Windows\AxInstaller

Enabled value: 1
Disabled value: 0

Apply with .reg · CMD · PowerShell

.reg

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\AxInstaller]

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

CMD

:: Options (use only one)

:: Enabled
reg add "HKLM\SOFTWARE\Policies\Microsoft\Windows\AxInstaller" /v "ApprovedList" /t REG_DWORD /d 1 /f
:: Disabled
reg add "HKLM\SOFTWARE\Policies\Microsoft\Windows\AxInstaller" /v "ApprovedList" /t REG_DWORD /d 0 /f

PowerShell

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

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

(list values)

REG_SZComputer

HKLM\SOFTWARE\Policies\Microsoft\Windows\AxInstaller\ApprovedActiveXInstallSites Current key

Enabled value: Depends on the option value
Element: Host URLs
Value type: REG_SZ
Add to existing value: true
Explicit value name: true

Apply with .reg · CMD · PowerShell

.reg

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\AxInstaller\ApprovedActiveXInstallSites]
"<enter name>"="<enter value>"

CMD

reg add "HKLM\SOFTWARE\Policies\Microsoft\Windows\AxInstaller\ApprovedActiveXInstallSites" /v "<enter name>" /t REG_SZ /d "<enter value>" /f

PowerShell

New-Item -Path 'HKLM:\SOFTWARE\Policies\Microsoft\Windows\AxInstaller\ApprovedActiveXInstallSites' -Force | Out-Null
New-ItemProperty -Path 'HKLM:\SOFTWARE\Policies\Microsoft\Windows\AxInstaller\ApprovedActiveXInstallSites' -Name '<enter name>' -PropertyType String -Value '<enter value>' -Force | Out-Null