Microsoft’s calendar moved from “warning” to “action” on October 14, 2025: Windows 10’s mainstream support officially ended, leaving millions of PCs outside Microsoft’s normal security update stream and thrusting consumers and IT teams into a high-stakes migration window that demands inventory, testing, and decisions now rather than later. Background / Overview
Windows 10 debuted in 2015 and, for a decade, served as the default desktop OS for households, schools and countless businesses...