Microsoft introduced Windows on November 20, 1985, as a graphical operating system shell for MS-DOS in response to the growing interest in graphical user interfaces.

Windows is a graphical operating system which provides a way to store files, run software, play games, watch videos, and connect to the Internet.

It came to dominate the world's personal computer market with over 90% market share, overtaking Mac OS.

The system is available in 32 and 64-bit versions and offers a graphical user interface, multitasking functionalities, virtual memory management capabilities, and support for several peripheral devices. The two most common editions of Windows for home computers are Windows Home and Windows Professional.

For further information, visit their official webpage.