How about introducing them to some of the Open Source apps like Thunderbird, Firefox, etc.
"TheOpenCD is a collection of high quality Free and Open Source Software. The programs run in Windows and cover the most common tasks such as word processing, presentations, e-mail, web browsing, web design, and image manipulation. We include only the highest quality programs, which have been carefully tested for stability and which we consider appropriate for a wide audience."
http://www.theopencd.org/
The following applications are included on TheOpenCD 2.0.
Productivity
* OpenOffice 1.1.3
* AbiWord 2.2.1
* PDFCreator 0.8
Design
* GIMP 2.0.5
* Blender 2.35a
* Dia 0.94
* TuxPaint 0.9.14
Internet/Networking
* FireFox 1.0
* Thunderbird 1.0
* Mozilla suite 1.7.3
* Gaim 1.1.0
* Filezilla 2.2.9
* TightVNC 1.3dev6
* WinHTTrack 3.32-2
Multimedia
* Audacity 1.2.3
* Celestia 1.3.2
* CDex 1.51
Utilities
* 7-zip 3.13
* Notepad2 1.0.12
* SciTE 1.62
Games
* Sokoban 1.187
* Battle for Wesnoth 0.8.8
* Lbreakout 2.4.1
Then explain how a secure Linux system is not vulnerable to adware, spyware, and all the windows viruses. How a stable system does not crash (no more BSOD). How each Linux machine can be setup as a multi-user system, so if someone needs to use a different machine any personal info they have will not be accessible to the other person.
If the machines are networked any updates can be done on one then automatically on all the others.
Linux vs Windows (a comparison)
http://www.michaelhorowitz.com/Linux.vs.Windows.html
Deciding if Linux is Right for You
http://www.faqs.org/docs/Linux-HOWTO...nux-HOWTO.html