Microsoft Windows 7 operating system
Various sources that document OS choices for Internet users indicate that Win10 usage approaches Win7 levels.
Paul Thurrott has a killer reason to upgrade Windows 7 to 10: time. A clean Windows 7 install takes a long day but less than 1 hour for Windows 10.
As Windows XP marketshare continues to drop, Windows 10 finally surpasses its desktop OS share, though Windows 7 remains firmly entrenched in first place.