Скачать или смотреть How to Uninstall Windows 11 and go back to Windows 10

This video shows you how you and uninstall Windows 11 and revert back to Windows 10

To Block Windows 11 From Re-installing

Select Start.
Type regedit.exe.
Navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate
If keys do not exist, create them by right-clicking on the previous key and selecting New then Key from the context menu.
Right-click on WindowsUpdate and select New then Dword 32-bit Value.
Name it TargetReleaseVersion.
Double-click on the new Dword and set it to 1.
Right-click on WindowsUpdate and select New then String Value.
Name it TargetReleaseVersionInfo
Double-click on the new String and set it to 21H2.
Restart the PC.

Whenever a new version of Windows 10 comes out then you need to follow the above again and change the 21H2 to whatever the latest version of Windows 10 is otherwise it will stay on the version that is in the string TargetReleaseVersionInfo