Hi Fred,
firstly, please activate your firewall as it shouldn't conflict with the norton one but if it does...... Turn the norton one off instead.
Personally I find norton far too intrusive for my liking and just stick to a free anti-virus utility like AVG 8.5. I also use Ad-Aware to take of spyware (I also turn off Defender).
As long as your pc is regularly updated then the default firewall is usually enough and I've never had any infection.
After the 60day period you'll probably get a 'nag' screen asking you to update norton, it should be a simple process to uninstall it if you don't intend to use it again. If it does become a pain to remove, you could always try a third party un-installer.
Anyway you could always post back for...