I have a MacBook pro that I'm having issues with. It connects to my home Wi-Fi (the n version of the Apple Airport Base Station) and I get a strong signal but whether I use Firefox or any other web browser or internet based program I get a message that I'm not connected to the internet. I can even select network diagnostics and it walks me through steps where I choose my network, reset my cable modem, base station, etc. and at the end it says it is unable to fix the problem. i have a 2nd MBP that I use on the same network with no issues at all. This issue started showing up about a month ago but did not happen often. Most of the time it happened when I had shut my MBP down since I had to go take it with me to meetings. Often after removing the battery for a minute I could boot up and it would work but now no matter what I do it won't work. Any ideas of what could be causing this? I know I may have to go to the genius bar to have this looked at but hope to avoid it. Is there any other troubleshooting I can do? Thanks for your help.