Microsoft Windows is a series of operating systems (OS) developed, marketed, and sold by Microsoft. Since its initial release in 1985, Microsoft Windows has come in a variety of different versions, each with its own unique features and purposes.
While some Windows OS versions have been well-received and have had long lifespans, others have been discontinued relatively soon after their release. In some cases, this is due to the release of a new and improved version of Windows. In other cases, it is because Microsoft has ended support for a particular version of Windows, known as end of life (EOL).
The table below provides an overview of some of the most popular versions of Windows, their release dates, and EOL.
source: endoflife.date