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How to Download Windows 11 ISO Files for Any Stable or Insider Build

We show you how to do a Windows 11 ISO download for any type of Build (Stable, Beta, Dev, Canary) and how to create a bootable USB stick from the ISO file.


Whether you're an enthusiast eager to test the latest builds or someone looking for a fresh installation, having access to the Windows 11 ISO file is crucial. This tutorial aims to guide you through the process of obtaining any Windows 11 ISO, be it for a stable release or an Insider build.

Why Download an ISO File?

An ISO file serves as a digital replica of a physical disc, containing all the data required for an OS installation. With the advent of Windows 11, many users might want to perform a clean install, either on a new machine or to rejuvenate their existing setup. Moreover, tech enthusiasts and developers often lean towards Insider builds to preview upcoming features, test software compatibility, or simply satiate their curiosity. Having an ISO file facilitates these endeavors, allowing for installations on virtual machines, creating bootable USB drives, or even dual-booting systems.

UUP Dump: An Unofficial Avenue for official ISO Builds

provides official ISO files for Windows 11, ensuring reliability and stability. However, these might not always encompass the very latest builds, especially those in the Insider program. For such instances, third-party tools like “UUP Dump” come to the rescue, enabling users to craft custom ISO files from any public preview.

Microsoft introduced the Unified Update Platform (UUP) as a more efficient update delivery system for Windows. Instead of downloading full OS builds, UUP allows devices to download only the changes that have been made since the last update, reducing the size and time of downloads.

UUP Dump doesn't host the Windows files itself. Instead, it provides scripts that fetch files directly from Microsoft's update servers. When you select a specific build and configuration on the UUP Dump website, it generates a script tailored to download the necessary files for that build.

Once the files are downloaded, the script then compiles these files into an ISO format. This ISO file is essentially a digital replica of what a physical installation disc would contain.

One of the advantages of UUP Dump is that it allows users to create custom ISO files. For instance, users can choose specific Insider Preview builds, even ones that might not be officially available as ISOs from Microsoft.

A Word of Caution

While the allure of the latest features and updates can be tempting, it's paramount to approach the process with an informed mindset. Insider builds, especially those from the Dev channel, can be buggy and might not be suitable for daily use. Always ensure data backups and understand the risks associated with installing unofficial or pre-release software.

In the subsequent sections of this tutorial, we'll delve deeper into the step-by-step process of obtaining any Windows 11 Build via ISO using “UUP Dump”.

How To Download Windows 11 ISO Files for Any Stable or Insider Build with UUP Dump

  1. Visit the UUP Dump Website and select a Windows 11 Build
    Open your web browser and navigate to uupdump.net, or if this is not working, to one of its clones such as uup.ee or uupdump.cn. As uupdump.cn is hosted in China, be careful with that version and use it at your own risk.

    You can then use the search bar to find any Windows 11 Build for the stable, or dev or beta insider channel.
    Windows 11 - UUP Dump - Search

  2. Use “Quick options” to get the latest Windows 11 Build for each channel
    Scroll through the list to find the specific Windows build you want. You'll see options like “Latest Public Release Build,” “Latest Release Preview Build,” “Latest Beta Channel Build,” and “Latest Dev Channel Build.” Choose the architecture you want, typically “x64” for most modern PCs. “x86” stands for 32-Bit versions and “arm64” for Windows 11 Build for ARM CPU architecture. (Windows 11 on ARM).
    Windows 11 - UUP Dump - Quick Options
  3. When using the search you will see separate links for each architecture
    Windows 11 - UUP Dump - Search - Result
  4. Choose the “Language” and click “Next”
    Windows 11 - UUP Dump - Languaje - Next
  5. Select the Windows 11 Edition that should be available in the Windows 11 ISO file
    The table on the right side shows the “Required edition” for specific Editions such as “Windows Pro for Workstations”, or “Windows ”.
    Windows 11 - UUP Dump - Edition - Aditional Edition - Next
  6. Select the download option and conversion options
    Windows 11 - UUP Dump - Download Method - Conversionas Options - Create Download Package
    • Download UUP set:

      This method allows you to download the Unified Update Platform (UUP) files directly without any conversion. It uses the aria2 tool to facilitate the download, which is a lightweight multi-protocol & multi-source command-line download utility. It's useful if you want to manually handle the files later or use them with another tool.

    • Download and convert to ISO:

      This option will download the UUP files using aria2 and then automatically convert them into an ISO file. This is the most straightforward method for most users, as the resulting ISO can be used for installations directly.

    • Download, add additional editions and convert to ISO:

      Beyond just downloading and converting to ISO, this method allows for additional customization. After downloading the UUP files with aria2, you can convert them, create additional Windows editions (like Pro, Home, etc.), and then package everything into a single ISO image.

    Conversion Options:

      • Include updates (Windows converter only):

        If checked, the converter will include the latest updates for the selected build in the ISO. This ensures you have the most recent patches and improvements.

      • Run component cleanup (Windows converter only):

        This option will run a cleanup on the Windows components, removing unnecessary files and potentially reducing the size of the final ISO.

      • Integrate .NET Framework 3.5 (Windows converter only):

        If selected, the .NET Framework 3.5 will be integrated into the ISO. This is useful since some older applications might require this version of the .NET Framework to run.

      • Use solid (ESD) compression:

        This option will use ESD (Electronic Software Delivery) compression, which is a more aggressive compression method than the standard WIM (Windows Imaging Format). The result is a smaller ISO file, but the trade-off is that the installation might take slightly longer due to the decompression process.

  7. Download the UUP Dump Script
    A ZIP file will be generated. Download this ZIP file to your computer. This file contains the script and tools required to fetch the Windows files and create the ISO.
    Windows 11 - UUP Dump - Create Download Package - Open File
  8. Extract the ZIP File
    Once downloaded, extract the ZIP file to a dedicated folder on your computer.
    Windows 11 - UUP Dump - Create Download Package - Open File - Extract All
  9. Ensure the folder name has no spaces
    Windows 11 - UUP Dump - Create Download Package - Open File - Extract All - Browse - Extract
  10. Run the UUP Dump Script as administrator
    Navigate to the extracted folder and find the file named uup_download_windows.cmd.

    Right-click on this file and select “Run as administrator” to run the script.
    Windows 11 - UUP Dump - Create Download Package - Open File - Extract All - Run as Admin

  11. If Windows warns you about running an unrecognized app, select “Run Anyway”
    To do that you have to click first on “More info”.
    Windows 11 - UUP Dump - Create Download Package - Open File - Extract All - Run as Admin - More Info
  12. Then click “Run anyway”
    Windows 11 - UUP Dump - Create Download Package - Open File - Extract All - Run as Admin - More Info - Run Anyway
  13. Wait for the script to finish
    The script will open a Command Prompt window and begin downloading the necessary files from Microsoft's servers. This process can take some time, depending on your internet speed.

    Once all files are downloaded, the script will automatically start creating the ISO file. This process can also take some time. Once it finishes you can “Press 0 to exit”.
    Windows 11 - UUP Dump - Create Download Package - Open File - Extract All - Run as Admin - More Info - Run Anyway - Exit

  14. Locate the ISO File
    Navigate back to the folder where you extracted the ZIP file. You should find the Windows 11 ISO file there.
    Windows 11 - File Explorer - ISO

How to Download The Latest Windows 11 ISO Files with and without the Media Creation Tool (without UUP Dump)

A few years back, Microsoft changed the way it delivered its Windows ISO downloads. Its new strategy encourages users to download a Windows tool called Installation Media which automatically grabs the latest disk image and burns it to a USB stick. But there is also a workaround, that allows you to download Windows 11 ISO files directly from the website. In our other guide we are showing you both methods.

How to Create a Bootable Windows 11 USB Install Medium From an ISO File

It takes just a few minutes to create a bootable USB from an ISO file, but it can save countless hours if your OS breaks down and you don't have a  spare PC to hand. In our other guide, we show you how to create a bootable Windows 11 USB that work both for Legacy or UEFI BIOS systems. The guide is for Windows 10 ISOs but works the same for Windows 11 ISO files.

Markus Kasanmascheff
Markus Kasanmascheff
Markus is the founder of WinBuzzer and has been playing with Windows and technology for more than 25 years. He is holding a Master´s degree in International Economics and previously worked as Lead Windows Expert for Softonic.com.