Does anyone have any problems with the Predator campaign on the PC? everytime i try and start the first mission it keeps crashing back to the desktop with the normal, AVP has encountered etc. The marine campaign and Alien one work fine. I tried a reinstall and it has screwed up steam, for some reason it has done a complete reinstall of that as well(i didn't tell it to!) and i have lost my SC2 demo as well!!!! as other demos.