NTLite – Make bootable ISO Image file from your custom WIM

What is WIM image file?

WIM is Windows Imaging Format. By default, “*.WIM” images are located in

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of the Windows ISO bootable file. There are 2 files available: “boot.wim” and “install.wim”. “boot.wim” is Windows PE (Windows Pre-installation Environment) that boots the installation media, to deploy “install.wim”, which contains the Windows files.
You can create updated “install.wim” file with your favorite programs installed, added Windows features and security updates or anything else. Or you can update “boot.wim” with the drivers that you need to boot your particular system / hardware that won’t load by default. You could create it with MDT (Microsoft Deployment Toolkit), SCCM (Microsoft Software Center Configuration Manager), Sysprep, or any other tools that can help you there.

What is NTLite

NTLite is a free software (though there is a paid version available with more features and business plans). There is an option of installing it as portable version. The main features of NTLite is modifying the Bootable ISO images of Windows installations. Changing the features of the installed system, making unattended.xml, adding drivers, updates, etc.

Make bootable ISO Image from your WIM file with NTLite

Now you want to make it bootable and return it back to the ISO image file and burn it to DVD or make a bootable USB Drive:
. Download NTLite
. Install it (There is an option to install as portable).
. Mount the Original ISO file that you made your updated WIM file from.
. Copy all the contents of the mounted ISO to some folder, like: “C:\MountedISO\”
. Overwrite the file


With your updated WIM file. It should be the same name “install.wim”
. Open NTLite

 . [Add] => Image file (WIM, ESD, SWM) => Choose "C:\MountedISO\sources\install.wim"
. It will be listed under "Image history" => Select "Operating systems | install.wim"
. [Create ISO] => Browse for NTLite.iso file location (You can take any name, like: Windows7x86.iso)
. ISO label: Windows7x86 => [OK]

*** Creation process will start

After the process is finished, you will get your final Bootable ISO file. You can burn it to DVD, apply to USB drive or anything else that suite your needs. If you need to Apply the ISO Image file to USB Drive with Rufus, you can check the guide in the link.

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