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