I have a 2010 MBP 15" running Windows 7 x64 with a NVidia GT 330M graphics card and when I first tried to play the beta, it told me I needed the 285.27 drivers. When I did the search for the drivers, I found there was a 285.38 driver available so I downloaded that one instead of the 285.27, only to find it made the gameplay super jumpy and laggy for me to where it is unplayable now. Any advice on what to do? Did I need to uninstall my previous drivers before installing the 285.38 ones? Thanks!