My Auto-protect wont stay on, says my Norton's has an internal problem

I have 2 error messages, when I click fix,( email not protected, and computer no longer protected from virus' it runs a scan, says it's successful, but the fix warnings are still there. When I click on auto protect..it just turns off again. I cant download updates, as I get Internal Error message.   My computer is so slow, it is almost impossible to do anything.  Scans come up clean.  This problem started yesterday after I did a system restore.  Did I do something to damage my Nortons?

 

Any feed back will be greatly appreciated,

thanks

Diane