There may be some thing wrong with my network card? My computer been working okay for years and now today saying choose network!! I click on my network to join and nothing happen.I tried this number of times and nothing worked. It like it can see the networks in my area but will not connect. So I restarted the computer and now when I click at the top the Airport setting it is saying no airport card installed. I tried firefox and safari and none of them will connect to the internet. The Airport setting at the top is gray out giving me no options and just saying no airport card installed. In System Preferences, network and airport under status say off, if I click turn on airport nothing happens. Under network name say airport is off. So it is giving me no options to join network because Airport is turn off. I can't seem to turn it on or get the Airport card to work. It all gray at the top next to Bluetooth and Volume. If I click on Airport it say no airport card installed. I'm not sure if the card gone bad and I need new card or if I need new drivers installed for the card. I tried restarting the computer and tried other profiles on the computer thinking may be the user profile gone bad and nothing works. Would I have to put in the Mac OS CD and installed the drivers for it? Or would I have to put in Mac OS CD and do an install of the OS. If I do that I will have to back every thing up first.