Protect avast! MAC instalation

How to prevent from users uninstall avast! on Mac ?

Normal users cannot modify the contents of /Applications directory - only those with “administrator” privileges (and this will pop extra password-request form to do the necessary step).
So, the application is protected. What’s owned by the user are preferences and a latest copy of virus database - but, when deleted, a failsafe-one is copied back and used instead.

So, user might decide to turn avast off, but can’t uninstall it forever (and affect other users) - and that’s correct.

Regards,
pc