This is arguably the most popular version of Linux today in terms of the number of users. It’s one of the closest systems to Windows in every day use, and can even copy across bookmarks and wallpaper so that you feel more at home.
The system is free and the company producing Ubuntu makes its money through charging for support. However, its popularity means you won’t have that much trouble getting help elsewhere.
You can run the system straight from a CD without having to install it, which makes it good for trying out. You can order a free CD from the site, download the files and burn them yourself, or buy it for $19.99 from Best Buy (this price includes 60 days free support).
http://www.ubuntu.com/