Wireless Router connected to 'phone line or cable will "talk" to the internet to and from a service provider.
Wireless card (and device driver S/W) in computer(s) and make local area (in your house) network connection to the router from each computer.
My router handles 7 PCs but seldom more than 4 at any time.
If laptop has stopped "talking" wirelessly use Control; Panel - Network Connections - Right Click on the Wireless Icon and select View Available Networks - should see your Router (maybe others too) and connect to it.
Good luck...
Peccavi, July 2009
