Knoppix

If you ever wondered what this Linux thing is, Knoppix is what you want. It is a live Linux DVD, meaning you boot from it, and there's no installation involved. When you are done you just reboot, and you're back in Windows. But that dosn't mean it is Linux Light. It (most likely) packs all the applikations you would want. And it is free. You can download the Knoppix DVD here, and the Knoppix CD here, and then burn the file to a DVD/CD as an image.