I have two PCs (One is Vista one is XP) set up to use my Charter cable 10M internet service. I am using a Motorola SB5101 modem and a Netgear MR814 router. Ethernet cable connections at both PCs. If if just connect my Vista through the modem I do get 10M service on Speedtest. If I connect up both the Vista and the XP though the router my Vista speed drops in half to 5M and my XP speed drops in half again to 2.5M to 3M. What is going on? Logic says the router is the problem. I am not a computer jock so please keep it simple guys. Thanks.