So, Comcast came out today and set up my new cable modem. When hooked directly from the modem into my MBP, there is no issue. However when setting up a wireless connection with my Airport Extreme, I have had horrible luck. I set up the network and it said it worked and the base station shows green. If I run an ethernet cable from my extreme to my MBP, it works fine, but if I unplug my ethernet and try to connect over wifi, it shows connected, but I get no real internet. The signal strength over wifi is really weak too. Can anyone tell me what I need to do to fix this? I have tried resetting the base station twice now and I continue to get the same result. Something else I can't figure out is why all of a sudden I need to enter an administrator password before connecting to a network or turning airport on or off. I am the only account on this computer and I have never had to do that before today. If someone has had this issue or knows an easy fix, please help. Thank you in advance!!