Error Updating Product

Live Update routinely fails with "Error Updating Product," with the explanation, "...could not shut down all drivers. As a result Norton is not running..." Many mornings I go to my PC, and this is the problem, and I have to reboot because Live Update cannot. Which drivers are causing the problem? I can't seem to find a log file to see just what is hanging up. This, together, with the constant, nagging pops ups reminding me to purchase other features is too much. I have attached a a screen shot. Any help will be greatly appreciated. Thanks. 

NortonError.png