Hello Basti,
I've done the Portmapping and running as administrator with and without deactivated Internet Security now. Origin finally installed the expansion End Game but it still doesn't install Back to Karkand and this Premium.
Greetings
Chris
Okay that sound a bit weird indeed. That might now sounds pretty basic, but have you tried a manual de-installation of your whole battlefield game to make a new installation? If that doesn't help, it might be that you have some issues with your game entitlements on your account. I would recommend to contact one of our Game Advisor then. They can check your account and help you to get back in to the game.
Cheers
Basti
