(Edited by beckyboo1234 at 12:32 am on Mar. 5, 2006)
It dosent take alot to make Norton die. Its possible to have a virus which will disable the antivirus service.
Be a little more descriptive
To answer your question, no I don't know how to fix it. I don't have Norton. Have you tried using the Help tool?
I hate norton! Unless you paid for it (I'm sorry) I'd uninstall it and install AVG. Have you tried uninstalling it, restarting, and reinstalling it?