OK, I'll give it one more try. I'm going to do this on Sunday after I perform my normal weekly system maintenance.
I currently have Norton's Worm Protection feature turned off so that's not an issue.
I'll boot into Safe Mode, install Zone Alarm 6.5.737.000, and boot normally. I'm hoping that will do the trick.
I will report back early next week with the results.
On a different track: is there anyone I can contact to participate in the Zone Alarm beta? I wonder if that might solve my problem.
Bill, I appreciate all your help. Thank you.