First off you need a wireless router. To configure it to enable wireless you will need to connect it to your PC via ethernet. If your PC does not have a wireless card then you will need the router to connect to the internet with that computer (unless you buy a wireless card). If you PC has a wireless card then the router does not need to be connected to the PC to get on the internet, only to configure it. I have a router downstairs in our livingroom and I can access the internet upstairs and in our conservatory. The signal strength will not be as strong but should be available. From advice that I have read somewhere the router should be placed if poss in the middle of the range of what you want and high up. Electrical equipment and walls will affect the signal.