Ubuntu 11.04 - Fucking right I use it.

Super-fast, easy to use and free, the Ubuntu operating system powers millions of desktops, netbooks and servers around the world. Ubuntu does everything you need it to. It'll work with your existing PC files, printers, cameras and MP3 players. And it comes with thousands of free apps.

And it comes with thousands of free applications. Ubuntu does everything you need it to. It'll work with your existing PC files, printers, cameras and MP3 players.

No viruses

Life's too short to spend it worrying about viruses. I Dual boot dough because I need games, and Windows has a monopoly on Direct X. Seeing as they invented it.You could game over WINE & Playonlinux, but it sucks.

 http://www.ubuntu.com/download/ubuntu/download