Creating a Minimal Windows 11 ISO File with Nano11 Builder

Nano11 Builder: Create a Streamlined Windows 11 Installation

Nano11 Builder is an innovative, open-source PowerShell script developed by NTDEV that offers an automated way to generate a significantly stripped-down Windows 11 image exclusively utilizing Microsoft tools, such as DISM and oscdimg.exe. The result: a lightweight operating system image tailored for efficiency.

This script is notable for being non-serviceable, which implies that it does not receive Windows updates, cannot restore deleted components, and lacks support for additional language packs. It serves as a robust alternative to the previously popular Tiny11 Builder, catering especially to users with low-end or unsupported hardware.

With the introduction of Nano11 Builder, users can create a custom ISO file for Windows 11 that can be as compact as 2.3 to 2.5GB, and the installed operating system’s footprint ranges from 2.8 to 3.2GB. This streamlined approach is particularly beneficial for those seeking a minimal installation without unnecessary bloatware.

Key Features of Nano11 Builder

Utilizes only native Microsoft tools to ensure reliability and safety.
Automates the process of stripping down the Windows 11 image.
Integrates an unattended answer file to simplify the installation process, bypassing the Microsoft account requirement.
Removes several built-in applications and components, including Microsoft Edge and Xbox, to minimize the OS footprint.

Step-by-Step Guide to Creating a Windows 11 Nano11 ISO File

Follow these comprehensive steps to download and create your custom Windows 11 ISO using the Nano11 Builder script:

Visit the Microsoft Support website.
Under the “Download Windows 11 Disk Image (ISO) for x64 devices” section, select the Windows 11 option.
Click the Download button, then select your preferred installation language.
Confirm your selection by clicking the Confirm button.
Download the 64-bit version of the Windows 11 ISO file to your computer.
Access the Nano11 GitHub page.
Click on the Code button and select Download ZIP.
Save the ZIP archive on your computer and navigate to its location.
Select the nano11-main-zip file and use the Extract all function to unpack it.
Launch File Explorer and navigate to the Windows 11 ISO folder.
Right-click the ISO file and choose the Mount option.
Note the drive letter assigned to the virtual drive where the ISO is mounted.
Open PowerShell as an administrator (right-click on the search result and select Run as administrator).
Execute the command to allow the Nano11 script to run on your computer:

Set-ExecutionPolicy unrestricted
Run the Nano11 Builder script with the following command:

& "C:\PATH\TO\SCRIPT\nano11builder.ps1"
Press “R” to initiate the reduction process.
Confirm with “Y” to continue.
Indicate the drive letter of the mounted Windows 11 image and press Enter.
Choose the OS index number (usually “1” for Home or “6” for Pro) to create the image and press Enter.
Press Enter to finish the script and complete the process.
Reset PowerShell’s execution policy to a more secure setting with:

Set-ExecutionPolicy Restricted

Post-Installation Notes

Upon successful execution of these steps, you will have a customized ISO file approximately 2.2GB in size, significantly smaller than the standard 5.4GB image. This ISO will be located in the “nano11-main” directory alongside the original script, labeled as “nano11.iso”. Additionally, a “nano11.log” file will be generated, documenting the entire creation process.

This nano11.iso file can then be used with USB bootable tools like Rufus or Ventoy to install the operating system. It’s compatible with various editions, including Windows 11 25H2 and 24H2.

Frequently Asked Questions (FAQs)

Will Nano11 receive system updates via Windows Update?

No, the image generated by Nano11 is non-serviceable, meaning it won’t receive any updates or patches from Microsoft.

Can I use the Nano11 installation on my main computer?

Although possible, it is not advised. The Nano11 image is intended for temporary use and testing only. Essential functionalities like audio and updates are lacking.

Am I able to restore removed apps, drivers, or features later on?

Unfortunately, once elements are removed through this process, they cannot be reinstated without performing a clean installation.

Is it compatible with Windows 11 Home, Pro, and LTSC?

The script supports various editions, including Home, Pro, and LTSC, but currently only en-US x64 is fully supported without user modifications for other languages or architectures.

How much space can I expect to save with this installation?

The original Windows 11 ISO can shrink from 5.4GB down to roughly 2.2GB, with an installation size of around 2.8 to 3.2GB depending on the version and system configuration.

For more detailed guidance and images, feel free to check out the original source.

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