After widespread criticism of the user interface for Windows 8, Microsoft decided to start with a clean slate in the next version of Windows to be released. What would have become Windows 9 was abandoned without ever seeing the light of day. The next Windows release was given the moniker Windows 10 to put some distance between it and the much-maligned Windows 8.
Since Microsoft was starting from scratch anyway, and since the marketplace had changed dramatically from the PC-centric world that the original Windows was born into, Windows 10 was designed as a universal platform. ...