ZoneAlarm supports a balanced, multi-layered approach to security. An important part of this approach includes keeping software updated with the latest security patches. This includes patches for your Operating System. 

If you find Microsoft no longer supports your version of the Windows Operating System; please understand ZoneAlarm will do everything we can to support you and your personal firewall needs, however, this in turn may affect our ability to support you and this version of Windows. 

Microsoft may have an announcement pertaining to your Operating System, go to:
https://support.microsoft.com/en-us/help/13853/windows-lifecycle-fact-sheet

Please see the current system requirements and compatibility requirements, go to https://www.zonealarm.com/software

Requirements are listed for each product