i have a wired router and have some stuff hooked up to it all on the first floor of my house. I want to get internet to an upstairs computer but cant get a cord up there. I know that one solution is a wireless router. Is there some kind of device used to hook one computer wirelessly from a wired router. Not a wireless router, just for one computer. I once saw these two little box things you point at each other and they send wireless internet. Is there something good kind of like that?