Lets be honest here
In addition to what Nick Ryan has stated:
Microsoft operating systems are to running a PC what Horace goes skiing was to gaming.
Fucking awful.
All those who laud over Microsoft do so because they know no better, Microsoft business practices have made Windows and MS Office ubiquitous not the quality nor efficiency of code.
Professional page, Page Stream, Calamus, NEOchrome, Degas, Delux Paint, Cuebase, Notator, Cyber Studio's CAD-3D, 3D-Calc all manged to run on Atari ST and/or Amiga platforms without crashing or fucking up the system. Add to this that they were not so entangled with the OS that they were a security risk and one realises that although pretty and easy to use for the average retard, Microsoft software is in fact a step backwards.
If evolution followed Microsoft methodology, life would be no more than sea dwelling over complex, interdependent multicellular organisms where the death of one cell meant the extinction of a species.