First released almost three years ago (and updated to 8.1 a year later),Windows 8 was a bet that didn't pay off. Bold -- or brash -- design decisions and a fundamental shift in UX led to a very slow uptake of the OS, and we're now just days away from the release of its replacement. Windows 10 comes at a difficult time for Microsoft, but although it too makes grand design revisions to the current formula, this time, it's fixing problems, not causing them.

http://www.engadget.com/2015/07/27/w...-10-editorial/