In the beginning of Windows (3.1), DOS was the principal foundation of Windows. When windows 95 came about, it started to become a more independent Operating System, from DOS. However to some extent DOS is still the base of Windows, it tells where each file is and goes. When major file renames, file uninstalls and repair need to be made, some technicians still find themselves depending on the command line. Because Windows will not allow certain moves and repairs to be done while running.