Hi, up until today my macbook pro has been connected to my roommate's router. Suddenly I now can't access the internet EVEN though my computer is still connected to the router. The WiFi is green and says the name of the WIFI connection but I get nothing. My phone and old white macbook (that i'm using now) still works with the wifi but not my macbook pro. I have no idea how to go about solving this issue, any help?