Clicking minimizes Walking Dead game to desktop

ripper2020

I don't remember if this is an issue with episode 1, but i've been playing episode 2 and clicking on a response will randomly minize the game and take me to the desktop. It's like the equivalent of hitting the windows key. It's super annoying. I also have pretty bad performance issues and just tried turning off shadows as I have ati cards. It seems to have helped a little. Any advice or tips?
System info:
core i7 @ 2.8 ghz
6gb ram
2(x) ati radeon 5870 in crossfire
windows 7 x64