I have a desktop pc that is wired to my dsl and wireless router. My laptop is wirelessly connected and access the internet fine. I've gone through the home network wizards on XP and all the names are correct etc. Does my desktop PC need a networking card? and if so, does it need a wired card ( because it's wired) or does it need a wireless card (because the laptop is wireless)? I want to share files but more importantly the printer. Thanks!!