Here's a portion of my update.cmd applied to index 4 of my wim file: Code: set Up64=%~dp0_x64_Updates set Wim64=%~dp0x64\install.wim set mnt=%~dp0Mount Dism /Mount-Wim /WimFile:%wim64% /Index:4 /MountDir:%mnt% Dism /image:%mnt% /Add-Package /PackagePath:%Up64% Dism /Unmount-Wim /MountDir:%mnt% /commit _x64_Updates folder contains all the *.msu files...