I just got BHD, the regular games works fine. When I join a multiplayer game, it only last for about 3-5 seconds before it sends me to the login screen so I never get to play.
Here is a list of things I've done because I'm not a computer retard.
1)Called NovaLogic and disabled firewall and even reinstalled.
2)Went through internet options and put all security levels to Low.
3)Downloaded all updates.
4)Asked the great people of Ritualistic for help, answers pending.