Needless to say, you, and other's points are well taken.
I have just tried the install with Avast running as my virus protector and there was no problem.
No doubt, when it comes time for my Norton renewal, I will certainly take these events into consideration.
BTW: Deciding to move to another virus/system enhancer should not be much of a problem. Apparently, Norton has removed most, if not all, of their system enhancer features from the basic product and put them into the latest version of Norton Utilities. Not a bad idea except for the price for all past features moving from approx. $40 to about $70. What

Now we have to pay an extra $30 for the same support features? No!
Bottom line: No Norton upgrade/renewal for me. Ten years of my loyal support down the drain.
Oh well...