it says your video card does not appear in our data base consequently you may or may not be able to the game with sufficient stability or performance we would appreciate your help in ensuring that we have sufficient information to adress your video card and driver in the future by clicking the upload details button you will help us track witch video cards are currently missing from our database the upload details button is not able to be clicked and yes it only comes up when i play lfd2 i have updated my drivers and the other thing i have not tried.
Do you have on board video? If so disable it. I am not sure if Steam is trying to read the discrete or the integrated video.
Update drivers...from NVIDIA's website not some one else...reboot and try it again.http://www.nvidia.com/Download/index.aspx?lang=en-us