Wubi is an unofficial Ubuntu installer for Windows users that will bring you into the Linux world with a few clicks. Wubi allows you to install and uninstall Ubuntu as any other application. If you heard about Linux and Ubuntu, if you wanted to try them but you were afraid, this is for you.
How does Wubi work?Wubi adds an entry to the Windows boot menu which allows you to run Linux. Ubuntu is installed within a file in the windows file system (c:\wubi\harddisks\ubuntu.hd), this file is seen by Linux as a real hard disk.
Is this running Ubuntu within a virtual environment or something similar?No. This is a real installation, the only difference is that Ubuntu is installed within a file as opposed to being installed within its own partition. Thus we spare you the trouble to create a free partition for Ubuntu. And we spare you the trouble to have to burn a CD-Rom.