This weekend my parents bought a new Acer desktop that comes preloaded with Windows Vista. Upon first boot you have to choose the OS language. Usually from then on the setup works flawlessly. This time it didn't.
Some Vista users are caught forever in a reboot lock after undoing an OS update. In this case you can either be happy to have a Vista recovery DVDs at hand (which we obviously didn't have), or the only remaining option is a partition editor.