It's been something of a process for Microsoft to get here.
Other market share estimators reckoned the glorious moment happened earlier past year - StatCounter reckoned January 2018 saw the world stumble into a Windows 10-powered future, but it took until December for NetMarketShare to agree.
Microsoft's intermediary Windows versions, Windows 8.1 and Windows 8, have about 5% share.
If you have enabled Windows 10's built-in administrator account, and upgrade from build 1803 to 1809 - that is, the April 2018 Update to the October 2018 update - you will find that a bug has been introduced that disables the account.
Interestingly, Windows' market share as a whole declined slightly between November and December, falling from 87.03 percent to 86.2 percent.
Windows 10 October 2018 Update Bug Breaks FLAC Support
Windows 7 Windows 7, one of the most successful Windows software, launched for PC users in 2009.
It would be interesting to know more about what drove those adoptions.
Microsoft says that it is aware of the problem, but the company does not plan on releasing a fix for it until the end of the month.
In other words, a fix has already been developed and it is now available for Windows Insiders running Windows 10 19H1 preview builds.
Except there will. If you're willing to pony up the cash, Redmond will keep those updates coming for another three years via paid-for Windows 7 Extended Security Updates (ESU) through January 2023. However Windows XP rebounded 0.31 points to 4.54 percent. However, adding in the tiny proportion of users still on Windows 8.0 pushes it into third on a combined total of 5.33.