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.

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ZoneAlarm Free Firewall version: 10.2.078.000
Vsmon version: 10.2.078.000
Driver version: 10.2.078.000
Web Identity Protections version: 1.5.396.0

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