Do you have wireless ? If so address the router setup screens (see router manual) and apply wireless security.
If you don't have wireless I can't see how anyone can be stealing your bandwidth.
Thanks for the info!
I don't think I'm considered wireless per se. I've got a desk top pc, big old honkin monitor with cables everywhere. My firewall is up and running so you think I'm ok?
It seems though, whenever my kids fire up their laptop (wireless) that my old pc looses a lot of power, sometimes freezing it up, which alerted me to the fact the maybe my neighbors are sponging off my service as well?