I wanted to convert my XP laptop to a dual boot with Ubuntu or Kubuntu. Whichever. I want to try out linux and maybe switch altogether. Run windows inside a Virtualbox if i would really need it (e.g. for work). So i looked up different tutorials, while i was cleaning up disk-space and suddenly bumped into Wubi. I assumed i had to play with partitions and bootsectors, but the Wubi-installer manages all that for you. Just download the program (1.4MB!), run it, fill in a user and password and it takes all the work out of your hands. Completely automatic. Ideal for me ;)