Microsoft had lofty ambitions for the adoption rate of its Windows 10 operating system when it was released back in 2015. After all, Windows 10 was initially made available as a free upgrade for Windows 7 and Windows 8.x users (and it is still available for free for a limited time if you meet certain requirements) and promised big functional

Source: Hot Hardware – Microsoft Reveals Windows 10 Installs Now Top 600 Million Globally