Can't "turn on" antivirus protection
I just got a new Mac and bought Norton Antivirus for Mac immediately. It is installed but I can't switch the button to the "on" position for Virus Protection under the automatic protection menu. (It does let me turn on idle-time scan and vulnerability protection.) When I attempt to turn it on it says: Anti-virus Auto-Protect could not load the scan engine. Please run LiveUpdate to get the latest version. However, when I attempt to run LiveUpdate, it stops loading in the middle and a box comes up that contain and "x" within a red box next to "AntiVirus Signatures" and then has a version there. I'm running OS X 10.8.2. I tried live chat several times but was only connected once and was disconnected during the discussion before my issue was solved. I tried to look through the forum but I couldn't find anything that helped. I'm new to all of this, so I apologize if this is a common concern that has already been answered.
Thanks in advance for any assistance.