Try the one you use the most. You will still have to be connected to the new one with a cable to set it up anyway. All the setting come from the disc. You will also be setting up the security so then you will be given a pass key by the router. This you WILL WRITE DOWN and keep safe. When finnished setting up and having disconnected the cable you can start up one of the other computers and if it has wireless built in, then when you go to connect to the internet it will ask you for the pass key. Type that in the box and away you go. WEll thats what I did with mine and they work ok. Security set to WPA. Hope this helps you.