Microsoft CEO Satya Nadella announced that Windows 11 has reached one billion users. This figure represents a 45 percent year-on-year increase and is achieved faster than Windows 10. The transition to Windows 11 has been influenced by the end of support for various Windows 10 versions in October, prompting users to upgrade. However, stringent hardware compatibility requirements have limited upgrades for many Windows 10 devices. Microsoft previously missed a target of one billion Windows 10 devices by 2018 due to issues with Windows Phone. The expiration of support for Windows 10 has led many users to upgrade to Windows 11 or enroll in the Extended Security Updates program. Industry analysts suggest that many enterprises are budgeting for hardware replacements or ESU costs ahead of the October 2025 deadline for free Windows 10 updates.