Microsoft’s decade-long maintenance cycle for Windows 10 ends today, October 14, 2025, when routine, free security updates, feature updates and standard technical support for mainstream Windows 10 editions stop — leaving millions of machines functioning but increasingly exposed unless their owners take one of three practical routes: upgrade to Windows 11 if eligible, enroll in Microsoft’s time‑boxed Extended Security Updates (ESU) program, or migrate to an alternative operating system...