I've been playing my Greenhouse games copy of Defense Grid for weeks now with no problems whatsoever. Recently I made an account on their website in order to track scores and achievements. There was no option to add the game to my account on their site so I emailed them with my license number and they enabled it for me with instructions to "run the game again with the Internet connection so that the stats are synced". Immediately after, my game began crashing with a defensegrid.bin error on startup on a white screen. I am however able to start the game if I disable my LAN card. I'm posting this here because Greenhouse took a long time to get back to me the first time and figured someone might have some insight.