Prevent IIS installation: registry value PreventIISInstallComputerHKLM\Software\Policies\Microsoft\Windows NT\IIS
- Policy ID
- PreventIISInstall
- Scope
- Computer Configuration
- Supported on
- Windows Server 2003 only
- Source
- Administrative Templates (.admx) for Windows 11 2026 Update (26H2) (version 1.0)
- Category
- Windows Components › Internet Information Services
Registry
PreventIISInstall
REG_DWORDComputerHKLM\Software\Policies\Microsoft\Windows NT\IIS Current key
- 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 NT\IIS] ; Options (use only one) ; Enabled "PreventIISInstall"=dword:00000001 ; Disabled "PreventIISInstall"=dword:00000000
CMD
:: Options (use only one) :: Enabled reg add "HKLM\Software\Policies\Microsoft\Windows NT\IIS" /v "PreventIISInstall" /t REG_DWORD /d 1 /f :: Disabled reg add "HKLM\Software\Policies\Microsoft\Windows NT\IIS" /v "PreventIISInstall" /t REG_DWORD /d 0 /f
PowerShell
# Common: create the key New-Item -Path 'HKLM:\Software\Policies\Microsoft\Windows NT\IIS' -Force | Out-Null # Options (use only one) # Enabled New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows NT\IIS' -Name 'PreventIISInstall' -PropertyType DWord -Value 1 -Force | Out-Null # Disabled New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows NT\IIS' -Name 'PreventIISInstall' -PropertyType DWord -Value 0 -Force | Out-Null