When Windows 10 was launched, Microsoft said it was intended to be the final version of the operating system.
But from 14 October 2025, there will be no new updates or security fixes for either the Home or Pro versions.
And Microsoft says its successor will represent one of the "most significant updates" to the OS in the past decade.
Its predecessor, Windows 7, was retired in 2020, although businesses could pay Microsoft to continue receiving updates for Windows 7 Professional and Windows 7 Enterprise.