How can I tell if my desktop PC has built-in Wireless Networking capabilities?

I have an HP Pavilion desktop PC which I bought back in 2005. I'm thinking of buying a wireless router so I can get this desktop and my laptop computer on the same wireless network. My laptop has Wi-Fi built into it, because it is a newer computer. As for this desktop PC, I am unsure whether it has wireless... show more I have an HP Pavilion desktop PC which I bought back in 2005. I'm thinking of buying a wireless router so I can get this desktop and my laptop computer on the same wireless network. My laptop has Wi-Fi built into it, because it is a newer computer. As for this desktop PC, I am unsure whether it has wireless networking capabilities built in or if I would have to buy a network adapter to get the PC to recognize the wireless signal from the router. How can I tell if my desktop PC (running Windows XP Home Edition) has wireless networking capabilities built in and whether or not I would have to buy a network adapter to accomplish this task?
8 answers 8