I had this problem with Windows XP Home and now with Windows Vista Home Premium (32):
Example: PC boots, internet connection is established, ZA starts. Then internet connection is lost and ZA crashes (just disappears without any message, not running anymore in system processes). No internet access with any program that normally connects (Firefox, messengers etc.).
This happens with ZA 7 and 8.
Operating System:Windows Vista Home Premium
Product Name:ZoneAlarm Pro