When I first got Portal 2, it ran fine and i got about 2 hours of gameplay until i got the error "Display Driver Stopped Responding and Has Recovered". I assumed it was because I overheated, and I turned off the computer for the day. The next day I got back on, and it didn't even let me in game without crashing and showing the same error sign. Ive uninstalled, reinstalled, and cleared the game, but nothing is working. Increasing the GPU processing time to 8 also did nothing. I even went to the in-game settings and put all the video graphics to the lowest settings, but that didnt change the game crash at all. I dont think its a matter of getting a new graphics card, because mine did work in the game for 2 hours. None of my other games give me this problem. Does anyone know how this issue can be solved?