Changing Default File Associations in Windows 10

Changing Default File Associations in Windows 10

Reference : http://woshub.com/managing-default-file-associations-in-windows-10/

Edit the register with following key

HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.fileExtName

How to Reset File Associations in Windows 10

Using the following command, you can reset the settings of file associations imported earlier:

Dism.exe /Online /Remove-DefaultAppAssociations

After running this command, all new users will be logged with the default file association (the reset has no effect on the existing user profiles).

In order to reset the file associations manually configured by the user to the default ones, you need to click on the Reset button in the Settings -> Apps -> Default Applications.

In this case, all file associations will return to the state of clean Windows 10 installation.

Importing Default App Associations on Windows 10

The resulting XML file can be imported into a Windows 10 on other computers using DISM tool:

Dism.exe /Online /Import-DefaultAppAssociations:C:\PS\DefaultAssoc.xml\

Important. These settings to map file extensions to apps will be applied only to new user profiles during the first logon.

You can also import these settings to the offline Windows image in the WIM file. First, you have to mount the image:

Dism /Mount-Image /ImageFile:C:\mnt\images\install.wim /MountDir:C:\mnt\offline

And then import the XML file:

Dism.exe /Image:C:\mnt\offline /Import-DefaultAppAssociations:\\Server1\Share\DefaultAssoc.xml

Tip. The current settings of file associations in the offline Windows image can be obtained using this command:
Dism.exe /Image:C:\mnt\offline /Get-DefaultAppAssociations