I have a Compaq Presario 6000, approx. 5 years old and it works very well. I've been using Road Runner for internet service. I now live in a wireless hot spot. Naturally the computer does not have a WiFi card installed. My business laptop connects without problem. I'm hopeful to to the same with my personal desktop. What do I need to purchase or install? I don't need to network computers, just be able to access the wireless internet. Any guidance is appreciated.