Windows 7 graphics card issues

I recently installed windows 7 with boot camp. I installed the drivers and everything. I then installed starcraft 2, but when I tried playing it, I was told my graphics card was not good enough. The weird thing is, I can play starcraft 2 on mac fine. I looked at my graphics card with dxdiag and it said I have a standard VGA graphics adapter. Please help.

Oh, I just figured something out. It says the video card is not accessible because no display drivers are installed.