graeme_p - 5:42 pm on Jul 17, 2013 (gmt 0)
You are missing two things:
1) Its a lot easier to secure desktop Linux. All you really need to do with most desktop distros is click OK when its asks whether to update. Servers are different, but desktop Linux is EASY.
2) I (and most people I know) use Linux because we prefer it NOT because it is free of cost. People who want free of cost use pirated Windows (where I live I have to tell shops I do not want pirated WIndows and software installed when I buy a PC).
You may have particular Windows only software you prefer. I do not, and neither do a lot of other people.
My experience is that people who regularly mess up Windows do not mess up Linux.