Another quick suggestion I have without looking at my current setup is to ask how they are each connected to the router??
Do any of the non-wireless computers use both the USB and the LAN (10/100 cable) at the same time?? I know with mine, only one or the other can be used at one time.
I tried using a router to hook up both a laptop by the USB connection, and a Desktop by the LAN (10/100 cable) and the router itself disabled the second one as soon as you used the first one. (That was kind of annoying.)
No both option available, only one or the other.
Also, if that's not the case, what kind of router is it??
Some of the better ones come with handy quick reference cards in the package, or on the manufacturers website as well to decode the pretty blinking lights on it.
I know for our modem and router, when we lose service, it has a certain pattern the lights blink as opposed to when it is fully operational.
I would check to see if yours has something that explains the lights, and check that for what it's worth.
(my paranoid self would be asking if your cable company can track how many users are on your "network" or how much bandwidth is being used on your "network", and asking about the possibility of them cutting you off (litterally) when more is alllowed.. But whos to say they can do that, or actually would take the time and single your family out.)
