How to create a custom Windows 10 ISO image
To create a custom Windows 10 ISO image, you need to prepare tools and source files, mount the original ISO, integrate drivers and updates, and finally encapsulate to generate a new image. 1. Preparation: Obtain the original ISO, Windows computer, editing tools (such as DISM), optional driver/patch/unattend.xml file; 2. Mount the ISO and extract the install.wim/esd file for mount; 3. Add general drivers, integrate .cab/.msu updates, and other customizations (such as pre-installed software, modifying settings); 4. Uninstall and save modifications, use oscdimg or built-in functions to encapsulate it as ISO, specify the boot file and test the installation process.
To create a custom Windows 10 ISO image, it is key to prepare the tools you need, properly integrate updates and drivers, and ensure that the final image is bootable and installable. The whole process is not complicated, but it requires careful operation to avoid errors.
Preparation: Collect tools and source files
Before you start, you need to prepare the following:
- Original Windows 10 ISO file (can be downloaded from Microsoft's official website)
- A computer running Windows
- Tools for editing images, such as DISM or NTLite
- Optional: driver, update patch (such as .cab or .msu files), unattend answer file (unattend.xml)
It is recommended to put all content in a dedicated folder for easy management. For example, you can create a new CustomWinISO folder, and then divide it into subdirectories such as SourceISO , Mount , and Output .
Unzip and mount the original ISO file
You can use Explorer to mount the ISO file directly, or you can extract content using the command line or third-party tools. Take DISM as an example:
- Open DISM and click "File" > "Open WIM/ESD/SWM Mirror"
- Select the
install.wimorinstall.esdfile in the original ISO you downloaded - Select the system version to modify (such as Windows 10 Pro)
- Click "mount" to the specified directory (such as
C:\Mount)
After this step is completed, you have a system image that can be modified.
Add drivers, updates and customize content
This is the most critical step, which determines whether your custom ISO can be installed smoothly and run normally on different hardware.
Add driver:
- Use DISM or DISM's Driver Management feature
- Browse drivers in local folders (usually
.inffiles) - Be careful to add only universal drivers to avoid conflicts
Integration update patch:
- Most of the update packages released by Microsoft are in
.cabor.msuformats - Select Update Management > Add Updates in DISM
- Recommended priority integration of the latest security patches and service stack updates (SSUs)
Other customizations:
- Modify the default user settings (such as turning off automatic playback, adjusting power options)
- Preinstall necessary software (be careful whether it supports silent installation)
- Add unattended installation configuration file (used to automatically skip initial setup steps)
Encapsulate and generate new ISO files
After all modifications are completed, the next step is to save the mounted image back to the WIM file and generate a new ISO.
Packaging steps:
- Uninstall and submit the mounted image (click "Uninstall" in DISM and select "Save Changes")
- Repackage into ISO using
oscdimgtool or DISM built-in features - Specify the boot boot file (usually
boot\etfsboot.comandefi\microsoft\boot\efisys.bin)
After generating ISO, it is recommended to use a virtual machine or USB flash drive to test the installation process and confirm that there is no problem.
Basically that's it. As long as you take it step by step and don’t worry, most people can complete it smoothly. The most common problem encountered in the process is driver conflicts or update patches incompatible, which needs to be checked one by one. Stay patient and get the skills after repeated tests.
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