I have abandonded ZA, because their issues with updates and upgrades.
I used to have the $$$-version and every time a new update was issued I held my breath ,hoping the computer would work afterwards.
I had to uninstall the entire application at least twice, because the system wouldn´t work at all. And when it takes some time to configure ZA; allow and dissallow apps, open and close ports , etc etc, it´s nothing you choose to do too often.
Die Hard
