dism /Apply-Image /ImageFile:"D:\sources\install.wim" /Index:2 /ApplyDir:"E:\" This is exactly what Windows Setup does behind the scenes. FAT32 has a 4 GB file size limit, but install.wim often exceeds this. Split it:
The Media Creation Tool often downloads an install.esd inside the ISO, not a .wim . If you see .esd , you can convert it to .wim using tools like dism++ or the command line ( dism /Export-Image ), but for most deployment tasks, working with .esd directly is fine. Part 3: How to Work With install.wim (Using DISM) Once you have the genuine install.wim (or .esd ), you can manipulate it using DISM (Deployment Imaging Service and Management Tool)—a command-line utility built into Windows 10/11. 1. View the Editions Inside a WIM A single install.wim can contain multiple Windows editions. To see them: install.wim download windows 10
Unlike a standard file copy, install.wim uses “single-instancing” technology—if a file appears in multiple editions, it is stored only once, significantly reducing the file size. This makes it the preferred format for IT professionals, system administrators, and advanced users for clean installations, custom builds, and automated deployments. dism /Apply-Image /ImageFile:"D:\sources\install
Introduction: What is install.wim?
dism /Unmount-Image /MountDir:"C:\mount" /Commit To deploy Windows to a target drive (e.g., E: ): If you see
The install.wim (Windows Imaging Format) file is the heart of the Windows 10 installation media. It is a compressed, single-file disk image that contains all the system files, drivers, default settings, and editions (Home, Pro, Education, etc.) necessary to deploy Windows 10 to a new machine.