I recently installed Ubuntu 12.04 to my old computer (a Dell) after XP began to run very slow, and am now trying to install a Edimax EW-7811Un 150 Mbps Wireless 11n Nano Size USB Adapter to connect to my Wifi. When I put the driver disk in, an error message comes up saying it cannot find the autorun program. I am new to using this OS and am entirely lost. How can I get the driver installed? Thanks!