I already had Win7 installed and my brighness was working fine but had a problem with Autocad 2009 where it wouldn't install so I re-install the whole OS again. So I just finished re-installing Win 7 on my MB using boot camp. Installed the bootcamp64 drivers and they all installed fine but when i press the button to lower the brightness it won't do it. It lowers the brighness on the keyboard but not on the screen. Tried inserted the DVD in there again and ran bootcamp64 again and chose to repair it but that didn't work. Im gonna try the remove option and re-install bootcamp64 drivers.