in a cmd prompt type
ipconfig /release
ipconfig /renew
this will be stupid but there should be a switch on the laptop to enable wireless. Is that on?
humor me
go into network setting and open adapter settings.
see if the wireless is enabled
ok next. what security are you using on your router? WPA WPA2?
or disable security altogether
switch to WEP. Vista is a biotch.
on the router security settings