• Restart the laptop.  (Apple Menu top left > Restart)  Try to connect again. If that doesn't work then:
  • Turn the Airport off and back on again (from the wireless icon on the top right of the top menubar).
  • Logoff your current account and login to the "Student" account (password "hello") and see if you can connect to your home wireless on this account.  
  • If you want to try a wired connection you can purchase this adapter