I have not looked at the forums you put up. But others on my TS coms have had the same issue with W7. Run as Admin is the only way it works once inside the game. It works fine till you enter game, you can hear but not speak. I was running with UAC off, no issue. I turned on UAC to default, issue.
I learned of Brinks tutorial, and use it to stop the pop-up on software I use. TS did not trigger a pop-up. But once I discovered talk issue, I applied the tutorial. WHalla, no more issue.

ty

ps: ty for ending the silliness on thread, was interest in understanding the TS phenomena not security.