(found on GitHub) allow you to select specific legacy versions like 21H2. This script initiates a download directly from Microsoft's servers, ensuring the file is genuine. Visual Studio Subscriptions : If you have a professional Visual Studio/MSDN subscription
Now that you have the bootable installation media, you can use it to perform various types of installations.
If you do not see the option to select "21H2" in Step 4, try the following:
Comprehensive Guide to Downloading the Official Windows 11 Version 21H2 64-Bit ISO From Microsoft
Download and extract the ZIP archive containing the batch files.
The page will default to offering Windows 11 2024 Update (24H2). To access version 21H2, you need to modify the user-agent or use the (still active as of 2025).
Since you cannot get it directly from Microsoft, here are the most reliable methods to find the ISO while minimizing security risks:
The official Microsoft website is the most secure source. While the main button usually points to the latest update, you can often find the "Select Download" dropdown menu. Visit the official Windows 11 download page.
Get-FileHash "C:\Users\YourUsername\Downloads\Windows11_21H2_English_x64.iso" -Algorithm SHA256 Use code with caution.