Windows 10 is a series of Microsoft Windows operating systems, first introduced in July 2015 after being announced in September 2014. It is the tenth overall major release in the Windows NT operating system line. It succeeded Windows 8.1 and was ultimately superseded by Windows 11 in October 2021. As of June 2024, operating systems from the series run on 66.1% of Windows devices.[1] In April 2023, Microsoft announced that Windows 10 2022 Update would be the last version of Windows 10 as the series will reach end of support on 14 October 2025.[2]