Wubi 7.04.03 : Install Ubuntu in Windows

Wubi is an unofficial Ubuntu installer for Windows users that will bring you into the Linux world with a single click. 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.

It does not require you to modify the partitions of your PC, or to use a different bootloader.
Just run the installer, no need to burn a CD.
Wubi keeps most of the files in one folder, and If you do not like, you can simply uninstall it.
Wubi (like Ubuntu) is free as in beer and as in freedom. You will get this part later on, the important thing now is that it cost absolutely nothing, it is our gift to you...

Download here.
Screenshots here.