Hey, i got my installation working after doing these steps:
Look in C:\Program Files\Unreal Engine\Launcher\Engine\Programs\NoRedist\UnrealEngineLauncher\Config for a file called “\DefaultEngine.ini”.
If you can’t find one, look if you have one called “DefaultEngine.ini.old.ver”. Take everything from that file, copy it into a new file called “DefaultEngine.ini”.
Restart UE4 and see if it works.