I have been using Zone Alarm for years with no issues.
However, I recently installed version 7 and started having memory problems.
Essentially all my system memory was being consumed over a peirod of days until finally there was no memory available and Zone Alarm would be forced to shut down.
I would re-boot and the memory leak would start over.
After trying to track the memory issue to something else, I finally uninstalled ZA and voila, the memory problems are gone. I wish I hadn't deleted the install file for Version 6 from my PC before verifying that version 7 was safe.
I'm running the Windoze firewall now.
Operating System:Windows XP Pro
Product Name:ZoneAlarm (Free)