As you all (should) know, Windows 7 is to be released tomorrow to retail
channels. Another Microsoft OS that most people are going to gobble up
obediently like Microsoft tells them. I would recommend (if possible)
switching users away from Microsoft. I myself will admit to using Windows.
Why? Games. I've spent more than I wish to count on video games for the past
decade (and even more) and they either run only on Windows (on WINE it may
not run or be very unstable), run poorly on Linux (crappy Linux port, run
poorly on WINE). And also the fact that driver development is second class
on Linux.
Does that mean that I think most people should stick with Windows? No. I
believe that most people would do well on Linux. No need for complex
anti-malware solutions. Lack of (less of, perhaps) malware on Linux, means
you won't have to clean up/reinstall their system every couple months.
Switch your friends/family members to Linux. I've done so, and haven't
looked back.