Install Ubuntu within Windows 7

view full story

http://askubuntu.com – Couple of years back I was using Ubuntu installed within Windows 7 OS. Back then Ubuntu version was 10.04. Today, I downloaded Ubuntu 64-bit Live Disc and when I try to install I do not understand how to install within Windows 7. So, any day later if I need to uninstall Ubuntu I can do by uninstalling via wubi. Somehow I do not find those options now. What am I missing? It's a DELL Inspiron laptop running Windows 7 Home edition. Well, more information on the issue: I have downloaded the disk image file: ubuntu-12.04-desktop-amd64.iso and burnt it to a physical disc. Upon starting wubi.ex (HowTos)