Microsoft Windows

Microsoft Windows

Family of operating systems produced for personal computers, servers, smartphones and embedded devices

Microsoft Windows is a group of several graphical operating system families, all of which are developed, marketed, and sold by Microsoft. Each family caters to a certain sector of the computing industry. Active Windows families include Windows NT and Windows Embedded; these may encompass subfamilies, e.g. Windows Embedded Compact (Windows CE) or Windows Server. Defunct Windows families include Windows 9x, Windows Mobile and Windows Phone.

Microsoft introduced an operating environment named Windows on November 20, 1985, as a graphical operating system shell for MS-DOS in response to the growing interest in graphical user interfaces (GUIs). Microsoft Windows came to dominate the world's personal computer (PC) market with over 90% market share, overtaking Mac OS, which had been introduced in 1984. Apple came to see Windows as an unfair encroachment on their innovation in GUI development as implemented on products such as the Lisa and Macintosh (eventually settled in court in Microsoft's favor in 1993). On PCs, Windows is still the most popular operating system. However, in 2014, Microsoft admitted losing the majority of the overall operating system market to Android, because of the massive growth in sales of Android smartphones. In 2014, the number of Windows devices sold was less than 25% that of Android devices sold. This comparison however may not be fully relevant, as the two operating systems traditionally target different platforms. Still, numbers for server use of Windows (that are comparable to competitors) show one third market share, similar to that for end user use.

As of October 2018, the most recent version of Windows for PCs, tablets, smartphones and embedded devices is Windows 10. The most recent versions for server computers is Windows Server 2019. A specialized version of Windows runs on the Xbox One video game console.


December 12, 2006

Microsoft Windows raises a $10,000,000 series B round from Storm Ventures, Genesis Partners and Opus Capital.

September 12, 2005

Microsoft Windows raises a $4,020,000 series A round from Storm Ventures and Genesis Partners.

Funding rounds

Funding round
Funding type
Funding round amount (USD)
Funding round date
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June 13, 2020
After the offer expired Microsoft forgot or didn't bother closing up the activation servers leading to users upgrading to Windows 10 for free years after the
Dan Goodin
June 6, 2020
Ars Technica
Once elusive, remote code execution is looking increasingly likely.
Chirinjibi Thapa
January 3, 2020
Read more about Remastered version Halo: Reach released for Microsoft Windows and Xbox One on Business Standard. Don't delve into the game expecting too much in terms of graphics. It is, after all, a remastered version of a 2010 game
Lily Hay Newman
December 23, 2019
It's been a rough 10 years in cybersecurity--and it's only getting worse.
Sean Gallagher
November 27, 2019
Ars Technica
Lost files and issues with backup management keep affecting Medicaid, other services.
Ivan De Luce
September 23, 2019
Business Insider
There are logos that have been deliberately untouched. Then there are brands that have constantly changed their look, like Pepsi and Apple.
Tom Li
Invalid Date
IT Business
Dell recently released the Latitude 5300 2-in-1 and 5400 clamshell Chromebook Enterprise laptops powered by Chrome OS. Oriented towards enterprise, the new
BBC News
June 5, 2019
BBC News
US security officials issue a reminder that computer users should keep their systems updated.


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