How to Downgrade / Reinstall to Windows 10/11 21H2

Using this method, you can downgrade to Windows 10/11 21H2 without losing any data. The previous Windows installation will be preserved in a folder called "windows.old" in the C: drive. This folder contains your old files and settings, allowing you to access and retrieve any data you might need.

Windows 10 21H2: Windows 11 21H2:


  1. Download one of the Windows 10/11 21H2 ISO file from the provided Google Drive links.

  2. Locate the downloaded ISO file on your computer and double-click it to mount it as a virtual drive.

  3. Open File Explorer and navigate to the drive letter assigned to the mounted ISO file.

  4. Inside the mounted ISO, locate the "Sources" folder and find "setup.exe" within it (not the one in the main folder). Double-click on "setup.exe" to start the Windows 10/11 installation process.

  5. Follow the on-screen prompts to set up your preferred language, time and currency format, and keyboard or input method.

  6. Select "Windows Pro" and click the "Install Now" button to begin the installation.

  7. Accept the license terms and click "Next."

  8. On the next screen, choose the "Custom: Install Windows only (advanced)" option.

  9. Select the drive where you want to install Windows and click "Next."

  10. The Windows installation process will begin. Follow the on-screen prompts to complete the installation.

  11. Once the installation is complete, you will need to set up your windows user account and configure your settings.

Video Tutorial

Disable Updates on your new Windows Installation

That's it! You've successfully downloaded the Windows 10/11 21H2 ISO without the use of a USB drive.

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