Were you starting a single player game? I thought the last update was going to include a change that would avoid this problem for a single player game (the client/server connection would not use sockets).
In any case, without fixing the system problem (by
reseting the network adapter, as you described), clicking on Join from the main menu would continue to give an error about network initialization. This can be caused by a too strict firewall, network drivers or other problems with a network card.
