Microsoft launched its newest operating system Windows 11 back in October 2021 to mixed reviews. Its predecessor, Windows 10, held the top spot firmly at the time while Windows 7 and Windows 8 were reaching the official end of life dates. While companies could extend support of Windows 7 by three years, Microsoft did not give home users such an option.
Microsoft CEO Satya Nadella announced during the company’s FY26 second-quarter earnings call that Windows 11 has officially surpassed one billion monthly active users.
Windows reached a big milestone: One billion Windows 11 users, up over 45% year-over-year.
In about four years, Windows 11 managed to reached the coveted one billion users mark. Windows 10, which was equally criticized when it launched in 2015, took longer to reach the important milestone.
How much longer? Not that much, it turns out. Let us take a look at the official dates that Microsoft provided for Windows 10 and Windows 11 first.
| Windows 10 | Windows 11 | |
| Launch Date | July 29, 2015 | October 5, 2021 |
| 1 Billion Users Date | March 16, 2020 | January 2026 |
Windows 10 reached 1 billion monthly active users 1,706 days after it was released by Microsoft. Windows 11 managed to cross the one billion monthly active users mark in 1,576 days.
That is 130 days faster. While not impressively faster, it is important to note that Windows 11 had a handicap all along: new system requirements prevented a sizeable chunk of Windows 10’s userbase from upgrading directly to Windows 11.
While Microsoft never released numbers, estimates suggest that several hundred million devices can’t be upgraded directly. While a high percentage of these devices can be upgraded by skipping the requirements checks, the technical nature of the process likely prevents this on the vast majority of devices running Windows 10.
For users, it does not really matter how fast or slow an operating system growth, provided that it manages to reach a number of users that is sizeable enough to warrant continued support.
Windows 10 Home and Pro editions will reach end of servicing later this year. It will be interesting to see what the millions of home users will do when that time comes.











