[Resettozero]

BitDefender Free — it is a Windows anti-virus program. Why would you try to install that on a Linux system?

Two reasons: I'm not all that smart. And, secondly, I searched for BitDefender Free for Ubuntu and there apparently are ways to install it on the Zorin 8.1 distro.

Why did I bother trying to get an anti-virus for Zorin? Because BitDefender's website indicated that Linux systems no longer are invulnerable. And I've heard more exploits are likely in days that may come. And I'm not all that smart...especially regarding Linux...and get information from various sources; sometimes the information does not agree.

[Utilizer]

...I searched for BitDefender Free for Ubuntu and there apparently are ways to install it on the Zorin 8.1 distro.

It might, under Wine, but it is not needed for almost all instances of Linux setups. You might be able to run a few previous versions of ms office as well (probably ms works would give better odds) but in the same way that linux has its own versions of "Office" available such as LibreOffice for one, the windows programs are not meant to run under 'nix OS's.