So yesterday I was browsing the internet when the wifi showed the ! symbol. So I clicked it and went to turn airport off and then back on. It would not turn back on. So i restarted my computer and then airport said said "no wifi hardware installed." After trying many different things nothing worked, so I decided to do a fresh install of lion. I made a bootable usb and did a fresh install. Now airport is not even installed on my computer... it doesnt show up in the network preferences or anything. I took my computer apart and unplugged the airport card and plugged it back in, but nothing...Any help would be greatly appreciated.