Can't uninstall ZoneAlarm completely? In fact, it is not difficult to remove ZoneAlarm if you know the removal. Free Download ZoneAlarm Uninstall - Remove all ZoneAlarm products installed on your computer and delete leftover data as well. I removed ZoneAlarm using "Add or Remove Programs" in the control panel, then installed and ran the program "Appremover". However, the how to do a complete uninstall of zonealarm pro firewall.