Windows 10 is now being used on one billion devices around the world -- that's one in every seven people on the planet. Since 2015, the operating system has made its way onto consoles, laptops and PCs across 200 countries, as exec Yusuf Mehdi notes that the entirety of the Fortune 500 is using Windows 10 devices. According to Microsoft, more businesses are in the process of transitioning to the system, too, so this number is set to increase in the coming months and years.