"1. Linux helps you get rid of viruses, worms, and other
"Although it is possible to get infected even with Linux
(malware is mainly written for Windows), its system architecture,
based on a server-client relationship makes it difficult for a
virus to do any damage. See this post.
"2. Linux is fast and will stay fast
"Vista is a huge resource hog. XP isn't too humble either. If
you use Windows for a longer time and install lots of different
programs, your computer becomes bloated with trash data,
consequently becoming slower. With Linux, even a major distro won't
demand more than 256 RAM to run passably with all the bling and a
maximum of 2 GB of space. And it won't get slower."