“I setup an ad-hoc connection with ICS and file sharing on my wireless laptop (XP Professional) and desktop PC (XP Home). The problem is that the internet doesn’t work. I keep getting the “unable to display” error or whatever it is. I tried turning off firewalls and changing Internet Explorer settings but still no luck. Please help!”

You may probably have your client PC set it with a manual IP address in the computer. Try changing this manual IP to automatic from TCP/IP properties of your network connection and you see what happens. The ICS comes with a small built-in DHCP server that assigns the IP Addresses automatically to the clients of ICS.