unattended from the word itself, auto configure na siya, working out-of-the-box , nasa desktop window ka agad.
clean install , not sure sa relation ng dalawa, pero eto yung "untouched" version ng windows, straight from microsoft site, cd or kung saan mo man naobtain yung copy ng windows, with userdata formatted on disk, as fresh install. meaning hindi ka nag upgrade from, kasi new as-is ang clean installation, walang intact na old userdata