I have a Compaq 900US laptop that has faithfully served me for several years. I am running windows XP with SP2 and install updates automatically. When I am in my home office I connect to the internet through my desktop which is connected via dialup. The laptop has no problem connecting to the internet in my office but when I go on the road, I have to either use dialup or wireless to connect. I get warnings that the network connection may not work properly (when I am travelling) and or the computer is not able to obtain an IP address. What should I do?