I recently bought a Dell Latitude e6510 with no HDD. I ended up using an old HDD and reinstalling win7 with a usb. Everything seems to be working great except I cant control certain things using the 'Fn' button such as adjusting keyboard illumination. Im not sure if I need to download drivers for the motherboard? I've tried googling but dont exactly know how to ask because I'm unsure what the problem is. any help is greatly appreciated.