Installing a 2014 engine on a modern OS presents challenges. Follow this guide precisely.
If you need this specific legacy version, follow these steps within the launcher: Open the Epic Games Launcher and navigate to the Unreal Engine "+" (Add Versions) button at the top. In the new engine slot, use the dropdown menu to select to download the pre-compiled version. Unreal Engine Key Features of Version 4.6 Unreal Engine 4.6.1 Compiled Installer