You need a wireless LAN card, there are loads on the market, try to buy one from a make you recognise like Sweex or Belkin or C Net. When you install them, which is easy, they just go in a spare PCi port inside your desk top. load the software but just load the driver not the utility, which will be the manufacturers own, then use windows to configure your wireless set up. One thing wireless is a lot slower than LAN cable so you wont get the same speed, but it is easier to move about.