Hey Spyke. Our issue was that we didn't even get to that loading box. The process would end even before that. So I think your issue is a little different than ours.
The teamviewer quickconnect button is a mod to all Windows. Next to your standard minimize/maximize/close buttons, a new QuickConnect button would show up. That was the cause of our issue. I'm not sure if you have any shell modifications installed or not. But if ya do, try disabling them and see if you have any results?