"Today, PC system security is paramount. Hackers, viruses, and malware usually target Windows systems, so using Linux moves you off the bull's-eye. Execute from a LiveCD and your system becomes nearly invulnerable; any damage done can be corrected by a simple reboot. That's part of why my current distro of choice is Kanotix 2005-2 LiveCD. I wanted a KDE-based distro for its simple, Windows-like appearance to help the 'Windows-only' family members with whom I share the PC. And since we require many applications, we needed a full-featured distro and access to additional applications if necessary.
"My short list of candidate distros included Knoppix, SimplyMepis, and Kanotix. Knoppix, the archetypical LiveCD, is a full-blown Linux system compressed onto a single standard CD. However, at the time I was deciding what to adopt, Knoppix did not include Firefox..."