We use ZoneAlarm Antivirus with Firewall software for protecting the Bring-Your-Own-Devices that our employees take to the offices, and for a limited number of teams only since it is not an approved corporative standard software yet. In total, there are about 150 laptops of different kinds with several generations of the Windows operating systems running ZoneAlarm.
Currently, we use the Free version of Zone Alarm and not the Extreme Security edition. As for the free solution, ZoneAlarm provides good security capabilities. We use both Firewall and Antivirus, with regular scans and updates scheduled.