I bought C2D iMac 20", this is my first mac. I love this, but it seems there's problem in wireless setting. #1 Whenever I turn on the imac, 802.1 x popup comes up. It asks me to input user id and password, even I don't have any. I don't know how to clear this. #2 Also whenever I turn on the imac, the airport is not connected. It's connected after I reselect my network from the list. I have tried to figure it out, but I can't get it. Is there anyone help me.. Thanks.