Not sure if this will help or not. MSFT did release a bunch of Win 7 updates within the last 48 hours. I also have comcast as my ISP (blech!). Because of this I use the Constant Guard Protection Suite, as well as Norton AV.
I have been having a problem, where when I login, I am UNABLE to see any server in the server selection screen. I contacted support, and he had me run the fix launcher command. Upon doing that, the launcher would not connect to the login server. Obviously at this point I realized that this was a connectivity issue.
Upon further investigation, I was able to determine that the Windows Updates, reset "some, not all" of my FW settings changing the swtor,exe from the setting "Allow" in my Norton FW, to "Auto". I manually changed it back, and now I am able to get to the login service, enumerate the servers, and login to the game
I hope this post helps some, if not all of you!