1 Download ZoneAlarm Go to https://get.zonealarm.com/extreme and click “DOWNLOAD”. Open the downloaded file and allow the app to make changes to your device. 2 Click on “QUICK INSTALL” and agree to the “End User License Agreement”. 3 Click “Finish” to proceed with the installation. 4 In order to complete the installation, you will be prompted with a popup to restart your PC. 5 After restart, open the ZoneAlarm Security on your desktop. Go to “Tools” in the upper right corner and select “Enter License”. Insert your 6-digit license code and wait for “License successfully installed” message.