Edit Registry on a mounted WIM

This guide assumes that ImageX is avaliable on your computer. (Avaliable via Windows Automated Installation Kit (WAIK).

Mount the WIM file

Mount the WIM file to a local folder using ImageX. C:\ImageX>imagex /mountrw install.wim 1 c:\mount

Load the registry hive

Load the registry hive you need. In this case let’s mount HKLM\Software.

C:\mount reg load HKLM\test c:\mount\windows\system32\config\software

Open Regedit to make changes or use Reg Add from the command line.

Unload the reg hive

C:\Windows\system32 reg unload HKLM\test

Unmount the image

C:\ImageX>imagex /unmount /commit c:\mount