now, I am not talking about dropped connections. my wirless network card, the airport, keeps disappearing Ive tried disabling and reenabling it in system preferences network I have reinstalled the airport utility software my computer works fine when connect with a cable but if I use wireless, after 10mins or so, the computer will freeze or hang then airport is disappeared, restarting a few times and it may or may not show up again so I am quite certain the network card is bad, I have apple care so they should replace it for free, correct? or is there a better replacement? is there a wireless N upgrade that is not too expensive? I have a late 2008 unibody also, my DVD drive failed long ago... I replaced it with a hard drive, guess I have to put the DVD drive back if I am going to send it off to apple. I heard the DVD drives might work again if they are opened and cleaned.