https://wccftech.com/windows-10-most-popular-os/

Microsoft has been waiting for this one. Latest statistics from Netmarketshare suggest that Windows 10 finally managed to overtake the user-favorite Windows 7 by the end of last year. According to the company, in December 2018 Windows 10 had a 39.22% market share, a little more than Windows 7’s 36.90% market share.

Previously, StatCounter, another analyst had shown Windows 10 overtaking Windows 7. However, stats from Netmarketshare consistently showed the latest desktop operating system tailing behind Windows 7.