Overview
- CEO Satya Nadella announced the milestone on Microsoft’s fiscal Q2 2026 earnings call and said Windows 11 usage rose about 45% year over year.
- Windows 11 reached 1 billion users in roughly 1,576 days, outpacing Windows 10’s approximately 1,706 days to the same mark.
- Upgrades accelerated after free support for Windows 10 ended in October 2025, with holiday PC shipments boosting Windows OEM revenue.
- Microsoft did not specify whether the 1 billion figure reflects active users or devices, nor the split between upgrades and new hardware, and it has not disclosed Windows 10 ESU enrollments.
- After buggy January updates and backlash over stability and unwanted features, Windows chief Pavan Davuluri says teams will ‘swarm’ in 2026 to improve performance, reliability, and the overall experience.