Network over taken by much powerfull outside machine

Hi all, the home remote computer sometimes gets the signal from another
outside the house source. Looking at the workgroup, the host computer is
replaced by "Coco's Mean Machine". It's obvious that it's signal is very
powerfull.
To test I turned off both DSL modem and Linksys router and the remote
computer kept going on the Net. How do I prevent his? Thanks in advance.

Hi
May be this can Help, http://www.ezlan.net/faq.html#signal
Jack (MVP-Networking).

"Richard" <(E-Mail Removed)> wrote in message
news:8369728F-CB8C-4065-8A77-(E-Mail Removed)...
> Hi all, the home remote computer sometimes gets the signal from another
> outside the house source. Looking at the workgroup, the host computer is
> replaced by "Coco's Mean Machine". It's obvious that it's signal is very
> powerfull.
> To test I turned off both DSL modem and Linksys router and the remote
> computer kept going on the Net. How do I prevent his? Thanks in advance.