You'd need a wireless access point, or if you don't have a router already, you can get a wireless cable/dsl router. Then you'd need either a wireless card and PCMCIA adapter for your desktop, or a wireless PCI card, or a USB wireless adapter. Best Buy has the router and wireless USB adapter on sale today. I saw that you've already posted about their ads. I use the Linksys wireless cable/dsl router and the Linksys wireless USB adapter. It works great and it's pretty simple to set up. If your PC sits on the floor under a desk, you may find the USB adapter works better since it comes with a long cable and you can mount it higher, away from other cables.