I installed avast for home today. Now ZoneAlarm can't open and asks me to restart my computer. But that doesn't help. Any chance avast could be interfering with ZoneAlarm?
I have both working fine. First I installed ZoneAlarm and then avast!
What are your versions for both programs?
The last build for avast is 4.1.319 and for ZoneAlarm Free 4.5.538.000
Anyway, the answer for your question is
maybe avast interferes in ZoneAlarm and viceversa.