I just downloaded Portal 2 through Steam and it installed OK, but everytime I start a game I get a white screen after the loading screen then it crashes, I tried verifying the game cache then it says it cannot validate one file so it re-downloads a 7.5mb file then I click "Play" then says completing installation then loads the game which yet again it crashes and this just goes on and on.
Any advice to get it working would help!
Any advice to get it working would help!