you do not say how you connect to broadband. An adsl modem router would be one way if you have adsl. Then you would need an rj45 socket in each pc. If the pcs do not have an rj45 a network card can be had for about a fiver. Standard patch cables are then needed from the router to each pc. If they are a long way apart it would be simpler to have the cable run in to a socket by each pc. My experience of most support staff is that if you do all this and then still have the problem they might look into it properly.