Microsoft windows also known as windows; windows operation system is developed by Microsoft Corporation to run personal computer. On 20^th November Microsoft introduce an operating environment called Windows as a graphical user interfaces for MS-DOS in responds to growth more interest in graphical user interfaces. Microsoft also overtake Apple OS in profit which introduce in 1984.

Version History:

The first version of Windows was Windows 1.0. Microsoft started a program called “Interface Manager” in 1981 and it was announced in 1983 under the name windows but windows 1.0 released on November,1985. The Shell of Windows 1.0 known as MS-DOS executive. Component included Calculator, calendar, clock, control panel etc. Next released version was windows 2.0 and it was released on December, 1987 and was most popular than its previous one. It had an improvement of the user interface and memory management. Windows 2.1 released in two different version: Windows/286 and windows/386. Windows/386 use virtual 8086 mode of the intel 80386 to multitask several DOS Programs and the Paged Memory model to emulate expanded memory using available extended memory.

Windows NT:

In November 1998, a new development team within Microsoft began work on a revamped version of IBM and Microsoft’s OS/2 operating system known as “NT OS/2”.

Windows XP:

The next major version of Windows of after Windows NT is Windows XP and it was released on 25^th oct, 2001. Windows XP would also introduce a redesigned user interface with start menu and a “task-oriented” Windows Explorer. With retaining some feature from previous version, Windows XP introduce an interface which was a new visual appearance, with an increased use of Alpha Composition effects, drop shadow, and Visual Style.

Windows Vista:

After Lengthy Development process, Windows Vista was released on 30^th November, 2006. It introduces a number of features form redesigned shell and user interface to significant technical changes with a particular focus on security features.

Windows 7:

Windows 7 was released on july22, 2009. Windows 7 was intended to be more focused, incremental upgrade to windows line, with the goal of being compatible with applications and hardware with which windows Vista was already compatible. Windows 7 had multi-touch support with an updated taskbar and redesigned windows shell.

Windows 8:

Windows 8 was released on 26 oct, 2012. Windows 8 introduces a number oof change including the introduction of user interface based around Microsoft’s Metro Designed language with optimization for touch-based devices such as tablets and all-in-one pc.

Windows 10:

Windows 10 was released on 30^th September,2014 as a successor of windows 8.1. Changes of pc returns on the start menu, a virtual desktop system, and the ability to run windows stores apps within windows on the desktop rather than in full-screen mode. In June 2021, shortly before Microsoft’s announcement of Windows 11, Microsoft updated their lifecycle policy pages for Windows 10, revealing that support for their last release of Windows 10 will be October 14, 2025.

Windows 11:

On June 24, 2021, Windows 11 was announced as the successor to Windows 10 during a livestream. The new operating system was designed to be more user-friendly and understandable. It is set to release in Fall 2021. Windows 11 will be a free upgrade to all Windows 10 users.