I will take it you have a router because i dont think u can get an ip address comflict without a router. Ok it means that both of your pc's have the same ip address, which they cant do. So to fix this you have to change one of the pc's ip address. To do that go to the bottom right of your screen, right click on the network logo pick network and sharing center then to the right of connection click view status, then properties,then internet protocal version 4. If that is set yo automatic then i cant help you i dont know why its happening. If its manual then u can either change it to automatic ( as long as your router has DCHP turned on) or you can change the ip address. Ok i hope you understood that lol.

No router only one computer w/two users and DSL access. I think somehow the two users I have setup on the computer are supposed to have different addresses but I guess they dont? I dont know how to check this. All this stuff is over my head.