I have two computers connected to the same router. One is running Vista and has a download/upload speed (Verison Fios) of 19.2/4.4 Mbps. The other machine is old, running XP and has a speed of only 10.2/4.4. Can anyone help me find the problem. The old machine now has a new driver for the ethernet card and a virus scan shows that it is clean. I swapped cable and changed location on the router to no avail. Please help. Thanks.