I'm having problems using ZA on a multi boot machine. Updated 29. September 2017 09:23 Note- ZoneAlarm is not officially supported on systems setup as multi-boot. One valid license allows you to use the product on one machine, including multi-boot machines. However, the ZA database file will be different based on the operating system, software installed on that system, where it is installed, etc. Some user have successfully installed on a PC setup with multi boot and In order to install ZA on a multi-boot system, you MUST install each copy of ZA separately on eat OS, and to different drives and folders.