My mac air has a hard time on many days getting and staying on my Airport Extreme Network at home. Web pages are very slow to load, and if anyone else is surfing on their computer, my air pretty much quits (mail just spins and spins). The only thing I can do is turn off and on airport on the Air. No problems with network for Macbook Pro or my wife's Macbook. My Airport Extreme is connected to a router from Comcast Cable. I've tried unplugging and resetting everything, which usually only fixes the problem for a few days. Anyone come up with any ideas?