Install ZoneAlarm Pro Antivirus + Firewall Updated December 15, 2020 07:36 Note: To install ZoneAlarm Pro Antivirus + Firewall, you might need to disable other antivirus or firewall programs if you start to have performance problems. ZoneAlarm Pro Antivirus + Firewall is compatible with Microsoft Windows Defender. See if your device complies with the System requirements. If you wish to migrate/upgrade from ZoneAlarm Pro Antivirus + Firewall v15.x to v3.5 ZoneAlarm Pro Antivirus + Firewall please contact technical support and they will assist you. NEW v3.5 Legacy v15.x ZoneAlarm Pro Antivirus + Firewall is an essential PC & internet security: antivirus, firewall and a unique Anti-phishing. Installation on PC: Click the link below to download your softwareDOWNLOAD Double click and Run the downloaded installer file.Look for an icon similar to below. Downloading will begin. This can take a few minutes to complete. End User License Agreement click the Accept and Install button. Installing ZoneAlarm Pro Antivirus + Firewall can take several minutes. When the installation has completed the above dialog will disappear and you will see and you will see ZoneAlarm Pro Antivirus + Firewall will open on your PC's desktop. There will also be a shortcut placed on your desktop. ZoneAlarm Pro Antivirus + Firewall is an essential PC & internet security: antivirus, firewall and a unique Anti-phishing. Installation on PC Click the link below to download your software:DOWNLOAD Double click and Run the downloaded installer file.Look for an icon similar to below without the version number blurred. Click Quick install to begin the Installation process. Review the ZoneAlarm End-User License Agreement and Click Agree ZoneAlarm will now Download, Install and Configure automatically. Your software is now installed. Click Finish to complete the installation.If prompted to Restart, then click YES to restart your PC to complete the installation.