I HAVE YELLOW ? NEXT TO MY DEVICE MANAGER WITH YELLOW ? ETHERNET CONTROLLER AND MS BUS CONTOLLER. WHAT DOES THIS MEAN? IS IT THE DRIVERS THAT NEED INSTALLING. CAN NOT FIND DRIVERS ON RESOURCE CD. I HAVE A DIMENSION 4550 AND RUNNING WINDOWS XP. OH AND WHY HAS MY @ BUTTON MOVED TO SHIFT 2.