Although Microsoft makes available the ISO file for previews of Windows 11 to allow users to test the clean installation and in-place upgrade process on virtual machines and spare computers, it’s not always the case. UUP Dump is a tool that allows you to create a custom Windows 11 ISO file from any public preview. The tool is a collection of other tools and scripts to download the latest builds from the Microsoft servers and create an unofficial ISO file that you can use to install the OS. In this guide, you will learn the steps to use the UUP Dump tool to download the ISO file for any publicly available preview of Windows 11.
Download Windows 11 build 25284 ISO file using UUP Dump
To download the Windows 11 ISO file for any Insider Preview build (such as build 25284), use these steps: Once you complete the steps, the Windows 11 ISO file will be created inside the folder where you extracted the UUP Dump tool. You can now use the ISO file to upgrade a testing virtual machine to the latest preview of Windows 11. Alternatively, you can use third-party tools like Rufus to create a USB media to install the OS on a spare computer.
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