Here are a few of the most interesting Microsoft Windows statistics I was able to dig up.\u00a0As always, be sure to check back in the future as I will be updating this post as new and updated stats become available. Microsoft Windows Statistics and Facts Launch date of Microsoft Windows OS: November 20, 1985 Number of Windows 10 users: 1 billion monthly active users Last updated 3\/16\/20 Number of countries Windows 10 has users in: 200 countries Last updated 3\/16\/20 Percentage of the Fortune 500 that use Windows 10 devices: 100% Last updated 3\/16\/20 Number of PCs running Windows globally: 1.5 billion Last updated 5\/7\/19 Number of computers that Windows 10 is installed on: 800 million computers globally Last updated 5\/9\/19 Number of Windows devices shipped in 2015 (combined): 275\u00a0million Windows Total Desktop OS Market Share: 91.41% Last updated 2\/1\/17 Number of Steam gaming PCs that are running Windows 10: 90% Last updated 11\/2\/18 Windows 10 Desktop OS Market Share: 50.99% Last updated 9\/1\/19 Windows 8.1 OS Market Share: 4.2% Last updated 9\/1\/19 Windows 8 OS Market Share: 0.63% Last updated 9\/1\/19 Windows 7 OS Market Share: 30.34% Last updated 9\/1\/19 Windows Vista OS Market Share: 0.15% Last updated 9\/1\/19 Windows XP OS Market Share: 1.57% Last updated 9\/1\/19 Number of Windows 8 licenses sold: 200 million Last updated 2\/13\/14 Amount Microsoft has paid out in Windows 8.1 bug bounties: $128,000 Last updated 10\/9\/13 Number of Cortana users: 145 million Last updated: March 2017 Number of questions asked to Cortana to date: 8 billion questions Last updated 7\/20\/16 Percentage of Americans that have never used Cortana: 72% Last updated 6\/11\/16 \tThis report\u00a0is available in an annual industry report. Some of the data in industry reports include: \tUsers \tDemographics \tRevenue \tGrowth \tEtc.-\u00a0all in one place I try to go through each and every stat regularly and update as much as possible, but we all know that some stats are easier to track down than others. As always, every stat is linked to its original source and has the source date listed. To get your copy of the report, click on the button below to purchase it. Report 1: Billion Users Club Report (Includes: Android, Apple, Facebook, Messenger, Google, Instagram, Microsoft, WeChat, WhatsApp, YouTube). Report 2: Digital Titans Report (Includes: Amazon, Amazon Prime, Apple, Facebook, Google, Microsoft).