Ok so I'm confused on what a wifi Ethernet adapter is well, I have a Ibook, a PC, and a nintendo wii. My ibook and Wii both have Wifi signal pick ups. they can pick any open wifi and use it. I have a router but it is starting to Break on me. So a Wifi Ethernet adapter would plug into my Pc and either my Ibook or Wii would get connection from the bandwith my Pc is using?