HELP! Can't connect to internet or unistall NIS for MAC

Good afternoon.  I upgraded to Snow Leopard and uninstalled NIS 4.0 for MAC.  I now can't connect to the internet.  I reinstalled Norton.  Still nothing.  Now I am trying to uninstall Norton again and it's telling me there is nothing to uninstall.

 

PLEASE HELP!!  How do I get rid of this and get my internet connect back.  All my other computers connect with no problem so I'm sure it's Norton.  HELP! HELP! HELP!