Hi, a friend has given us his old desktop computer. We are going to put into a spare bedroom where there are not any in coming Virgin Media cables. We already have a wireless network in the house. Which is the easiest way to get the desktop 'online' without using cables? Do we need a card fitted or is there something that just 'plugs' into a usb. Apologies if this is a stupid question but i just do not have a clue!