foreign computers in network view

Shootist said:

Read something someplace about Win 7 doing some type of Ad-Hoc networking at the same time it is doing infrastructure (Access point) WiFi.
So those other PCs you are seeing are other notebooks that are close to you.

It can, but will not do so by default those are machines listed in either the same domain or workgroup [or if you marked a share as a favorite] they will show up in the devs and printers panel as well as net neighborhood. Homegroup I believe causes this as well so if you have a homegroup setup those should be the one's joined to it. In wireless your adapter can either do Infrastructure OR ad-hoc, but not both at the same time [unless you have a really nice dual antenna with dual adapters listed in your network adapters folder [for one adapter not for things like VM Ware or other virtual devices]]. Like I said I would log-in to your router and CHANGE YOUR WIRELESS network password. After that you can bring each of your devices online one and a time and watch your router's wireless connections and see if you all of a sudden get a machine you did not connect listed there. There are also software solutions that can monitor your network. Basically one type is install the software and it polls your network setup. If it changes it can alert you to the change. Keep in mind common sense as well if you live on a farm in the middle of nowhere you prolly dont have many people trying to steal your wifi. On the other hand if you live in an apartment building MAKE SURE you use WPA or WPA2, hide your SSID Broadcasts, and change your password on a regular basis.

Have you turned off BT-FON - that allows any other bt user to use your routers wi-fi and BB bandwidth. You have to go to their site and diable it.
There's a link (IIRC) in the routers cp.