TWD Stopped working After I finished the Game
 

I bought all 5 episodes of TWD from Amazon for my PC (Win 7 64 bit) and then installed Steam and downloaded the game. It worked great! I finished all 5 episodes with no problems. Lots of fun!
But then ... When I went back to play the game again ... I started a new game and played all of episode 1 and moved on to episode 2, but when I clicked play I got a black screen. I could see the cursor moving but that's it. It wouldn't even let me shutdown. (esc)
I unistalled TWD and Steam. Deleted all folders and data online and on my PC. Reistalled everything starting from scratch ... And the same thing happened again. AAARRRGGG!!! Help!!!