My apartment has an included internet service (sucks) wherein all the computers are connected to a LAN, which has access to the internet meaning that we can all share files/game. I just bought a laptop and had a wireless/cat5 router lying around so i decided to connect that to my room's ethernet port. Now, with the desktop connected to the router via cable and the laptop via wireless, the two computers can see eachother. I can't, however, see the computers on the apartment's LAN - though i could before i installed the router. Dunno how to fix that.