Here's the steps to reproduce.
1. ZA auto starts with the computer.
2. Right click ZoneAlarm in the System Tray and click Exit
3. Launch a program such as notepad - the program will crash immediately on startup.
4. Start ZoneAlarm again and the problem goes away, you'll be able to launch programs just fine.

I have the Dr Watson full log to help someone diagnose it.

Can anyone else reproduce this? I would be interested to know if this also effects the Pro version.

ZoneAlarm Free Firewall version:
Vsmon version:
Driver version:
Web Identity Protections version: 1.5.396.0

OS Name: Microsoft Windows XP Professional
OS Version: 5.1.2600 Service Pack 3 Build 2600