I'm not sure who told you that a good av is one where you install and forget it about it but that is not good.
a good av is one that protects you better and nod is better then Norton, not to mention how much faster and lighter it is.
as for nod setting use one profile to use for all scan types then for that profile set you settings like this:
as you can see on the top right corner of the pic I'm using the control center profile as my default and those is the settings for it.
you spend good money on RAM, don't put in in Norton's pockets, put it in your own ; )