Out of nowhere, my MBP stopped loading the majority of webpages. It will still load a few (such as google), however. The websites always say "Unable to load the webpage because the server sent no data. Error code: ERR_EMPTY_RESPONSE" Airport claims it's connected, and Diagnostics says that it's working fine. Network setup assistant claims it cannot establish a network connection (but then i run diagnostics and it claims my connection is working; all lights are green for airport, airport settings, isp, server, etc) I've already tried deleting all preferred networks and re-adding mine. I tried plugging my computer into the wall with an ethernet cable but nothing changed. I've restarted my laptop multiple times but nothing has helped. I was temporarily able to use the internet when i switched to a guest account, but shortly after i suffered the same problems as on my normal account. Any help would be GREATLY appreciated.