I downloaded the season from Steam and when I go to load the penal zone a black screen appears and doesn't load. No messages come up and I have to turn off my computer as I can't alt tab or ctrl alt and delete out of it.
I downloaded the latest graphics drivers.
Windows 7 64 bit
ATI Radeon HD 5870 Mobile
intel i7 q720 1.6ghz
EDIT: Ok I've fixed this problem.
Comodo firewall doesn't work well with this. Usually when I play a game through steam comodo is preventing it from starting and it's underneath the game waiting for me to allow the game to perform something. However I couldn't alt tab to allow it.
Just add the .exe file to "my own protected files" in comodo and it should work.