On October 14, 2025, Microsoft will end mainstream support for Windows 10 — a firm lifecycle cutoff that stops free security updates, feature fixes, and routine technical assistance. This is not an instant outage: Windows 10 PCs will continue to boot and run after that date, but they will become progressively more exposed to newly discovered vulnerabilities and compatibility issues unless you take action. The practical choices are straightforward: upgrade eligible machines to Windows 11, buy...