[ben333]

Your neighbors are probobly not good hackers. Most likely, they bought a new laptop with a built in wireless card and see your free internet. I would set up WEP, a MAC filter or simply shut off DHCP and set a different default gateway. This will stop most adverage wireless users from acessing your network. You can also log in to your router and ban them by their MAC address. Fell free to PM me if you want extra help. And welcome to the forum!