To Do a Clean Uninstall for Zone Alarm via Zone Alarm Properties, you have to go to the Start menu. You need to Click All Programs and Click Zone Labs in the list. You must Right-click on Uninstall Zone Labs Security. You should pick Properties from the menu. After that, Look under Target for the following command line: C:\Program Files\Zone Labs\ZoneAlarm\zauninst.exe. You can Add /clean to the end of the command.
You have to make sure that the command line reads as follows: C:\Program Files\Zone Labs\ZoneAlarm\zauninst.exe /clean. You need to make sure that you inserted a space before the command /clean and Click OK. Next, go to the Start menu. You must Click All Programs and Zone Labs. Then, click Uninstall Zone Labs Security. Forth, Click OK for any confirmation prompts that appear and Click Yes to remove all files. Last, reboot the computer.