Open your case's side panel, Find the ethernet card which should be located to the bottom left of the case, sticking out of the motherboard horizontaly. You will need a philips screw driver and take out the screw holding it in place to the case. Pull that thing out! Then place the new card carefully in the slow. A manual for the new ethernet card shall give you pictures on how to do so. Replace the screw, mount the door back on the case. Voila! Good luck! :good: