File Association

Steps to Automate Setting File Associations via Group Policy Using Command Line

Run the following command to export the current file associations to an XML file:

Dism /Online /Export-DefaultAppAssociations:C:\file_associations.xml

Note : There is a command via DISM to import the file, but it breaks windows profile Please do not use this “Dism /Online /Import-DefaultAppAssociations:C:\file_associations.xml”

Option 1: Apply the XML via PowerShell Script

# Path to the XML file
$xmlPath = "C:\path\to\file_associations.xml"

# Set the Group Policy for default app associations
Set-ItemProperty -Path "HKLM:\SOFTWARE\Policies\Microsoft\Windows\System" -Name "DefaultAssociationsConfiguration" -Value $xmlPath

OPtion 2: Via Psexec

psexec \\%%i -s cmd /c "reg add HKLM\SOFTWARE\Policies\Microsoft\Windows\System /v DefaultAssociationsConfiguration /t REG_SZ /d C:\file_associations.xml /f"