I've performed a recovery installation in the past and I wasn't given this prompt. Is it normal? Do you think this refers to the disc that came with my motherboard (which I know has 'some' drivers on). Thank You. Edit: I now understand I can download such a driver from the Nvidia site but how can I find the model of my bus? My mobo is an ASUS P5N32-SLI Premium. Edit 2: Checking the mobo manual I wonder if the item listed in the LAN section is the network bus (NVIDIA nForce 590 SLI). Is that right? In which case, presumably, I would need this driver.