Windows 8 :2012
Microsoft released Windows 8 with a number of enhancements and debuted its tile-based Metro user interface. Windows 8 took better advantage of multicore processing, solid-state drives (SSD), touchscreens and other alternate input methods. Users found the switching from the traditional desktop to the tile-based interface awkward. Even after Microsoft's UI and other updates in 8.1, Windows 8 trailed not just Windows 7 but XP in user numbers into 2014.
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