Guide to Download Tiny11 ISO for Windows 11 25H2 Preview Version

If you’re looking to perform a clean installation of Windows 11 25H2 without the usual bloatware, you’re in the right place. Utilizing Tiny11 Builder, you can generate a customized ISO file that excludes unnecessary applications and facilitates the use of local accounts. This guide will walk you through the process of creating a debloated version of Windows 11 using the necessary tools.

Understanding Tiny11 Builder

Tiny11 Builder is a community-developed script attributed to @NTDEV_. It is specifically designed to streamline the Windows 11 installation experience by removing superfluous default applications and services, thereby resulting in a more lightweight and agile operating system.

This powerful tool can eliminate various applications, including Clipchamp, Xbox, OneDrive, and Microsoft Edge, among others. It not only facilitates app removal but also streamlines the Windows setup process by incorporating an unattended answer file that allows users to bypass the Microsoft account requirement, opting instead for a local account. Additionally, the use of the “compact” deployment flag helps minimize the overall size of the final installation.

Benefits of Using Tiny11 Builder

As Windows 11 continues to evolve, it tends to integrate an increasing number of features and preinstalled applications, many of which may not be relevant to all users.Tiny11 Builder empowers you to create a version of the operating system that meets your unique requirements, enabling a simplified and efficient experience.

This tool is particularly advantageous for advanced users interested in minimal setups for performance optimization, virtual machine deployment, or older hardware configurations, as well as for those who prioritize privacy.

The latest update to Tiny11 Builder occurred in November 2024, with support extended up to version 24H2. As the core components of versions 24H2 and 25H2 remain largely similar, you can confidently utilize this tool to develop installation media for the upcoming feature update.

Why UUP Dump for Windows 11 25H2?

With the anticipated official release of Windows 11 version 25H2 scheduled for Fall 2025, it will not be available for download immediately. Instead, you’ll need to rely on UUP Dump—an open-source tool designed to retrieve official files directly from Microsoft’s update servers, facilitating the creation of a clean ISO file.

Creating a Custom Windows 11 25H2 ISO with Tiny11 Builder

Follow these structured steps to download and create your Windows 11 25H2 ISO file using Tiny11 Builder along with UUP Dump:

Visit the UUP Dump website.
Navigate to the Downloads tab.
Choose the “Windows 11 Insider Preview” option to download the latest (x64) ISO file, such as build 26200.5702. If your device supports an ARM processor or is a Copilot+ PC, select the “arm64” architecture instead.
Select your desired installation language in the “Language” setting.
Click on the Next button.
Choose the versions corresponding to the 25H2 editions to include in your Windows 11 ISO file.
Hit the Next button again.
Select the “Download and convert to ISO” option.
Check the “Include updates (Windows converter only)” option to integrate updates into the ISO, which may take about an hour to complete.

Quick note: Selecting this option ensures that the resulting ISO file will reflect version 25H2 with the included updates.
Click the “Create download package” button to download the tool locally.
Access the zip file using File Explorer.
Click the Extract all button.
Choose a location for the extracted files.
Click the Extract button to finalize.
Right-click the “uup_download_windows.cmd” file and select Run as administrator.
Click on More info.
Hit the “Run anyway” button to initiate the lengthy process.
Press R to run the script, then hit Enter.
Press 0 when prompted to close the screen.
Visit the Tiny11Builder GitHub page for the latest script.
Download the most recent zip file from the “Assets” section.
Save the script file on your device.
Locate and open the corresponding folder.
Select the Tiny11Builder-main-zip file and click Extract all.
Click on the Extract button.
Open File Explorer and navigate to the ISO folder of Windows 11 25H2.
Right-click the ISO file and select “Mount”.
Note the drive letter assigned to the virtual drive where the ISO is mounted.
Go to Start, search for PowerShell, right-click the top result, and select Run as administrator.
Enter the command to permit the execution of the Tiny11Builder script:

Set-ExecutionPolicy unrestricted
Type “R” followed by pressing Enter.
Confirm the drive letter for the Windows 11 mount point and press Enter.
Identify the index number corresponding to the OS edition and press Enter.

Quick note: The UUP Dump script may display only a couple of index options, unlike the official ISO which may include a more extensive selection.
Press Enter to finalize the process and exit the script.
Reset the PowerShell execution policy to a more secure state with the following command:

Set-ExecutionPolicy Restricted

Upon completing these instructions, your script will generate a personalized ISO file that allows for a pristine installation of Windows 11 25H2.

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Should you face issues executing the UUP Dump script during the initial steps, locate the “Remove_Failure_MountDr_TempDir.cmd” file within the script folder, right-click it, and choose “Run as administrator”. Once that completes, you can re-run the UUP Dump process.

Ensure your machine has adequate storage; approximately 70 GB of free space is recommended for this operation to prevent any delays or complications.

Once finished, your ISO can be mounted in a virtual machine or utilized with tools such as Rufus or Ventoy to create a bootable USB installation media.

The absence of a direct download link for this ISO version stems from two reasons: it remains in development, and the script facilitates safer handling by ensuring no unauthorized alterations happen to the ISO file. Transparency is key, as users can review the script before execution.

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