All,
Had the same starting issue from Steam with ZoneAlarm. I do not have the toolbar. But I did not want to uninstall. Should not be needed, and is not needed.
This workaround worked for me.
-In ZA, uncheck the box 'start ZA with windows' (or similar)
-Reboot
-Start STEAM
-Start Arma3
-Once in the game, restart ZA
Hope this helps