Zone Alarm is a good program and I have used it for quite some time now. But, yesterday I upgraded to the latest version 3.1 ( I believe) and I had nothing but problems with my system from the 1st minute I started trying to use it.
The best version they came out with was 2.6.362 and I will never upgrade again.
Trust me once I did the upgrade nothing worked right on my system.
Luckily, I had my system ghosted on the back partition. So, I ghosted it back to the way it was, took me all of 6 minutes, and everything is fine now.
So, just a warning. Don't upgrade to the new 3.1 version.
Good luck,
Laffctx