Richard and Ken, thank you for your replies.
I deleted literally hundreds of obsolete and duplicate entries from my ZoneAlarm, rebooted and, as expected, was prompted for new permissions for programs and applications needing Internet access that were started and (so far) there seems to be no negative side-effects.
I was warned by ZA during that deleting process that certain entries might be a bad thing and could cause harm to my computer (System requirements, etc.), so I left those alone.
I'm looking through the links at alternatives to ZA which Richard posted, though I must say I'm very comfortable with the job of protecting my computer that ZA has done for me for the past few years and I'm reluctant, albeit open-minded, when it comes to consideration of any change.
Write this off as similar to the "my car always seems to operate better after it's been washed" syndrome but, I do seem to detect my computer starting faster after reboot/restarts since trimming down all those ZA entries.
Thanks again.