Automatic Update Not Working

I have a windows vista machine running Norton 360.  The machine is set up for automatic updates to be processed but I get the X that says Norton needs fixing.  I click on the Fix Now and Norton goes to check for  updates but never updates and just continues to run.  I have used the Norton Kill and Reinstall now at least 3 or 4 times.  Is anyone else having this problem and if so how have you stopped it.  I want to have the most up to date updates but I don't want to have to key using the kill and reinstall program