Windows 11 (x64): Requesting downgrade to Windows 10 (x64)

Service: Windows 11 (x64) Media Creation Tool, Windows 10 (x64) Installation Media, Windows 11 Installation Assistant, and a legacy Enterprise Resource Planning (ERP) desktop software installation wizard.

Scenario: I have a fresh, direct installation of Windows 11 (x64). I need to downgrade this machine to Windows 10 (x64) to resolve a critical application compatibility issue. I have an ERP System that can't be installed on Windows 11. However, I know that if it is installed correctly on Windows 10 first, we can then perform an in-place upgrade to Windows 11 and the software will work fine. I want to know if there is a way to trigger this downgrade to Windows 10 without completely wiping my primary storage drive.

Result: The installer package for the ERP system fails to initialize or execute on Windows 11 due to OS version verification checks. Furthermore, because this was a clean, direct installation of Windows 11 rather than an upgrade from an older OS, the native "Go back" option is missing/disabled under the System Recovery settings.

Environment:

• Operating System: Windows 11 Pro/Home (x64) - Fresh Clean Installation
• Activation Status: Fully activated using a valid retail/OEM Windows 10 product key
• Target OS Needed: Windows 10 (x64)

Troubleshooting efforts: I checked the Windows Recovery settings menu to look for the built-in rollback option, but the "Go back" button is completely unavailable since no Windows.old directory or previous OS footprint exists on this fresh installation. I have verified that a clean install via bootable USB is a manual option, but I am searching for a less destructive alternative first.

Supporting materials: I have activated the license with a Windows 10 key, and I would really appreciate finding a way, as I have an ERP System that can't be installed on Windows 11. Knowing that, if it's installed correctly on 10, then we can upgrade to 11, it will work fine.

Give reproducible steps:

1. Perform a fresh, clean installation of Windows 11 (x64) on a formatted drive.
2. Activate the OS using a standard Windows 10 product key.
3. Attempt to run the legacy ERP system setup wizard (the installer blocks execution due to Windows 11 environment detection).
4. Navigate to Settings > System > Recovery (observe that the "Go back" option to revert to Windows 10 is greyed out or missing entirely).Service: Windows 11 (x64) Media Creation Tool, Windows 10 (x64) Installation Media, Windows 11 Installation Assistant, and a legacy Enterprise Resource Planning (ERP) desktop software installation wizard. Scenario:
   I have a fresh, direct installation of Windows 11 (x64). I need to downgrade this machine to Windows 10 (x64) to resolve a critical application compatibility issue. I have an ERP System that can't be installed on Windows 11. However, I know that if it is installed correctly on Windows 10 first, we can then perform an in-place upgrade to Windows 11 and the software will work fine. I want to know if there is a way to trigger this downgrade to Windows 10 without completely wiping my primary storage drive. Result:
   The installer package for the ERP system fails to initialize or execute on Windows 11 due to OS version verification checks. Furthermore, because this was a clean, direct installation of Windows 11 rather than an upgrade from an older OS, the native "Go back" option is missing/disabled under the System Recovery settings. Environment:
   • Operating System: Windows 11 Pro/Home (x64) - Fresh Clean Installation
     • Activation Status: Fully activated using a valid retail/OEM Windows 10 product key
       • Target OS Needed: Windows 10 (x64)
   Troubleshooting efforts:
   I checked the Windows Recovery settings menu to look for the built-in rollback option, but the "Go back" button is completely unavailable since no Windows.old directory or previous OS footprint exists on this fresh installation. I have verified that a clean install via bootable USB is a manual option, but I am searching for a less destructive alternative first. Supporting materials:
   I have activated the license with a Windows 10 key, and I would really appreciate finding a way, as I have an ERP System that can't be installed on Windows 11. Knowing that, if it's installed correctly on 10, then we can upgrade to 11, it will work fine. Give reproducible steps:
   1. Perform a fresh, clean installation of Windows 11 (x64) on a formatted drive.
   2. Activate the OS using a standard Windows 10 product key.
   3. Attempt to run the legacy ERP system setup wizard (the installer blocks execution due to Windows 11 environment detection).
   4. Navigate to Settings > System > Recovery (observe that the "Go back" option to revert to Windows 10 is greyed out or missing entirely).