Wubi is an officially supported Ubuntu installer for Windows users that can bring you to the Linux world with a single click. Wubi allows you to install and uninstall Ubuntu as any other Windows application, in a simple and safe way. Are you curious about Linux and Ubuntu? Trying them out has never been easier!
Check out: http://wubi-installer.org/ [3]
Links:
[1] http://linux.philosweb.com/drupal/category/it/software/software/os/linux
[2] http://linux.philosweb.com/drupal/category/it/software/software/os/microsoft
[3] http://wubi-installer.org/