Windows 10 was released in 2015 meaning it took about three and a half years for Microsoft to achieve this record. While owning the desktop OS market, Microsoft has still fallen well short of its original goal from when Windows 10 was first released. The computer giant had originally aimed for Windows 10 to be installed on one billion devices within a three year timeframe. Regardless, even with a few stumbles, Microsoft had quite a 2018 and Windows 10 certainly played a part.