In trying to sell any Linux system, there are several things that must be mentioned.
1) Any associated costs. Assuming a Windows user who wants something like typical Windows use, what is it going to set me back to get a close approximation?
2) What “must have” software is out there for Linux? I’m talking antivirus, VLC for media, DVD burners, Firefox for Linux, Open Office, others?
Not sure if you are not in the know or just advising..There is antivirus, VLC and mplayer for media, A litany of browsers, Libre is a solid office suite.
These days, unless you are on the bleeding edge with printers or games, I can't see a reason not to run linux. If you absolutely need to run a windows app, install windows as a VM on VirtualBox and run the app there.
Personally, I like openSuSE but that is still too geeky and not ready for primetime. Fedora or Mint are excellent choices as viable candidates to get off of windows however.
MOST Windows software either has a native equivalent or will run under Wine. I recognize that there are some that don't do as well under Wine as under Windows, but that is increasingly becoming the exception.
2) What must have software is out there for Linux? Im talking
I use CLAM. Free of charge
VLC is native for Linux, so no problems
Multiple options...plenty of them out there
I prefer Chromium personally, but Firefox is ported to Linux as is Opera
I prefer LibreOffice, but Open Office works as well. There are other choices as well
I like running gpodder as a podcatcher, Clementine as a streaming audio client, Thunderbird for email client, GIMP for graphics (admittedly not the easiest piece of software to run and I think a very poor second to Photoshop), Eclipse (not essential for 99% of people out there)