In short, stock settings, SSID broadcasting and WPA security. If not there are reasons it won't work. Sorry but I can't type in that reason with every post.
I have a netgear wireless router, from this I have a desktop a home laptop (XP), 2 work laptops (XP), an Xbox360 and Nintendo Wii.
All connected and worked fine up until about a month ago. Suddenly my Home laptop could not connect. I kept resetting the connection and reconnecting without any joy. I went to get up off the couch and placed the laptop on the arm of the chair, when I returned it had connected and was displaying web pages. Fine I thought but as soon as I rotated it 90 degrees and placed it on my lap, the connection was lost again. I don't wish to start messing about with the router as everything else appears to work fine.