Just noticed this, haven't played the Orange Box in a while. Whenever I start up a game, the screen starts flickering black every few seconds. I googled it, and it seems to be quite common on hardware configurations across the board.

I tried all the solutions I could find. I.e newest drivers, start in a window, disable AA, but I still get it. Anybody here found a solution, or suffer from it.

All other games work flawlessly.