Enable App Installer Additional Sources: registry value EnableAdditionalSources (AppInstaller)ComputerHKLM\Software\Policies\Microsoft\Windows\AppInstaller
- Policy ID
- EnableAdditionalSources
- Scope
- Computer Configuration
- Supported on
- At least Windows Server 2016, Windows 10 Version 1809
- Source
- Administrative Templates (.admx) for Windows 11 2026 Update (26H2) (version 1.0)
- Category
- Windows Components › Desktop App Installer
Registry
EnableAdditionalSources
REG_DWORDComputer- 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\AppInstaller] ; Options (use only one) ; Enabled "EnableAdditionalSources"=dword:00000001 ; Disabled "EnableAdditionalSources"=dword:00000000
CMD
:: Options (use only one) :: Enabled reg add "HKLM\Software\Policies\Microsoft\Windows\AppInstaller" /v "EnableAdditionalSources" /t REG_DWORD /d 1 /f :: Disabled reg add "HKLM\Software\Policies\Microsoft\Windows\AppInstaller" /v "EnableAdditionalSources" /t REG_DWORD /d 0 /f
PowerShell
# Common: create the key New-Item -Path 'HKLM:\Software\Policies\Microsoft\Windows\AppInstaller' -Force | Out-Null # Options (use only one) # Enabled New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows\AppInstaller' -Name 'EnableAdditionalSources' -PropertyType DWord -Value 1 -Force | Out-Null # Disabled New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows\AppInstaller' -Name 'EnableAdditionalSources' -PropertyType DWord -Value 0 -Force | Out-Null
(list values)
REG_SZComputer- Enabled value
- Depends on the option value
- Element
- Additional Sources:
- Value type
- REG_SZ
- Value name prefix
- -
Apply with .reg · CMD · PowerShell
.reg
Windows Registry Editor Version 5.00 [HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\AppInstaller\AdditionalSources] ; Add one value per list entry, increasing the number "1"="<enter value>" "2"="<enter value>"
CMD
:: Add one value per list entry, increasing the number reg add "HKLM\Software\Policies\Microsoft\Windows\AppInstaller\AdditionalSources" /v "1" /t REG_SZ /d "<enter value>" /f reg add "HKLM\Software\Policies\Microsoft\Windows\AppInstaller\AdditionalSources" /v "2" /t REG_SZ /d "<enter value>" /f
PowerShell
# Add one value per list entry, increasing the number New-Item -Path 'HKLM:\Software\Policies\Microsoft\Windows\AppInstaller\AdditionalSources' -Force | Out-Null New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows\AppInstaller\AdditionalSources' -Name '1' -PropertyType String -Value '<enter value>' -Force | Out-Null New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows\AppInstaller\AdditionalSources' -Name '2' -PropertyType String -Value '<enter value>' -Force | Out-Null