I myself having gotten Brink recently, decided to livestream it (no livestream info provided) I then went ahead and decided that i didn’t want to and closed it.
The thing is: when i turned Brink on, it loaded up, showed the black-screen with BRINK on the screen then kicked me out of viewing the window, i couldn’t access the window, or open it at all.
the reason why i think this happened is because when you run livestream, it changes the format to windows basic, when you exit livestream the format changes back. when it changes back, that’s where the bug happens.
the only way to fix this is to restart your computer (as far as i know)