Windows has been the most widely used operating system globally since its launch in 1985, currently powering over a billion active devices each month. Support for Windows 10 will end on October 14, 2025, meaning Microsoft will stop providing security and feature updates, as well as technical support for Windows 10 PCs. Users can check their eligibility for upgrading to Windows 11 through the Settings menu or the PC Health Check app. Windows 11 features enhanced security, improved performance, and a modern user interface, with built-in accessibility tools and AI capabilities. The Windows 10 Extended Security Updates (ESU) program will provide critical security updates for personal devices from October 15, 2025, to October 13, 2026. Organizations can subscribe to ESU for continued security updates for a year, with the option to renew annually. Windows 365 offers a cloud-based solution for transitioning to Windows 11 without needing to replace all devices immediately. Various Windows 11 and Copilot+ PCs are available from partners like Acer, ASUS, Dell, HP, Lenovo, Samsung, and Surface.