Hello anyone who can help. For the past week my MacBook has been unable to connect to the wifi in my apartment building. It's very frustrating. I spent the last week in a hotel for work and the Internet worked perfectly. I get back home and nothing, it's bull ***** and I am going to throw this damn computer out the 12 story window in a minute. Since I'm in a building I have access to routers or modems. My network preferences says my airport is connected to my network and has an ip address. In "advanced" I have IPv4 on DHCP and I have it all connecting automatically. Under DNS servers I have two server address but they are greyed out, no real knowledge of how that works though so I leave it alone. No proxies are selected. Under network diagnostics, airport, airport settings, and network settings are all green. ISP, internet, and server are red and failed. I have tried everything I know, and have searched google for hours over the past few days. I have deleted all locations and added new ones, restarted, turned airport on and off but this retarded thing won't work and it's so frustrating. Short of tearing it into millions of pieces and mailing it to apple with ****** you spray painted on it what are my options? Oh yeah and this happened out of the blue last week while I was connected to the Internet. It just stopped working.