I bought Portal 2 a long time ago, and was able to play and beat it when I did. But now I want to replay it but when I open it, it crashes about 5 seconds in every time. I get to the valve logo and then it closes. I tried novid thinking it was just the video causing problems, but I still crash within 5 seconds of opening it. I've also tried verifying the cache and reinstalling the game, but neither solved the issue.