I've got a computer downstairs that is connected to the internet and I'm wanting to connect my computer upstairs as well. I've found out that I need wireless router (Belkin modem router or something) but what I was wondering is, do I need the "wireless network card" to go into my computer? It's just the computer upstairs seems to be internet ready and was wondering if it still needed a network card regardless. I just don't want to waste my money on something that I might not need.