Ok guys, my father bought me an Alienware M15X for my birthday. Well that's not the problem, here's the problem,

At the first time I play Left 4 Dead 2, the laptop can run it perfectly, but at the second day, the laptop can't run it perfectly, I mean this laptop use GTX 260M so it should run L4D2 with no lags. I realized that I haven't downloaded the newest NVdia Verde driver. So I downloaded the driver and it works, but everytime I turn on my laptop I always need to download the driver to run L4D2 perfectly. And now everytime I download the driver, my laptop still can't run L4D2 with the recomended settings.

Please help me, I just want to play L4D2 and some other games without lags or something like that.