Install ZoneAlarm Free Firewall Updated December 16, 2020 05:24 Note: To install ZoneAlarm, you must first uninstall any other Firewall software. Otherwise, you may experience OS stability and computer performance issues. ZoneAlarm is only compatible with MS Windows Defender. See if your device complies with the System requirements. Join millions around the world who have installed the best-in-class ZoneAlarm Free Firewall. 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 without the version number blurred. Accept ZoneAlarm privacy policy and click Quick install to begin the Installation process. Review the ZoneAlarm End-User License Agreement and click Agree. To install Web Secure Chrome browser extension select Add to Chrome or Skip. 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.