History

Microsoft has taken two parallel routes in its operating systems. One route has been for the home user and the other has been for the professional IT user. The dual routes have generally led to home versions having greater multimedia support and less functionality in networking and security, and professional versions having inferior multimedia support and better networking and security.^{[citation needed]}

The first version of Microsoft Windows, version 1.0, released in November 1985, lacked a degree of functionality and achieved little popularity, and was to compete with Apple's own operating system.^{[citation needed]} Windows 1.0 is not a complete operating system; rather, it extends MS-DOS. Microsoft Windows version 2.0 was released in November, 1987 and was slightly more popular than its predecessor. Windows 2.03 (release date January 1988) had changed the OS from tiled windows to overlapping windows. The result of this change led to Apple Computer filing a suit against Microsoft alleging infringement on Apple's copyrights.^[9][10]

A Windows for Workgroups 3.11 desktop.

Microsoft Windows version 3.0, released in 1990, was the first Microsoft Windows version to achieve broad commercial success, selling 2 million copies in the first six months.[1][2] It featured improvements to the user interface and to multitasking capabilities. It received a facelift in Windows 3.1, made generally available on March 1, 1992. Windows 3.1 support ended on December 31, 2001.^[11]

In July 1993, Microsoft released Windows NT based on a new kernel. NT was considered to be the professional OS and was the first Windows version to utilize preemptive multitasking.^{[citation needed]}. Windows NT would later be retooled to also function as a home operating system, with Windows XP.

On August 24th 1995, Microsoft released Windows 95, a new, and major, consumer version that made further changes to the user interface, and also used preemptive multitasking. Windows 95 was designed to replace not only Windows 3.1, but also Windows for Workgroups, and MS-DOS. It was also the first Windows operating system to use Plug and Play capabilities. The changes Windows 95 brought to the desktop were revolutionary, as opposed to evolutionary, such as those in Windows 98 and Windows Me. Mainstream support for Windows 95 ended on December 31, 2000 and extended support for Windows 95 ended on December 31, 2001.^[12]

The next in the consumer line was Microsoft Windows 98 released on June 25th, 1998. It was substantially criticized for its slowness and for its unreliability compared with Windows 95, but many of its basic problems were later rectified with the release of Windows 98 Second Edition in 1999.^{[citation needed]} Mainstream support for Windows 98 ended on June 30, 2002 and extended support for Windows 98 ended on July 11, 2006.^[13]

As part of its "professional" line, Microsoft released Windows 2000 in February 2000. The consumer version following Windows 98 was Windows Me (Windows Millennium Edition). Released in September 2000, Windows Me implemented a number of new technologies for Microsoft: most notably publicized was "Universal Plug and Play."

In October 2001, Microsoft released Windows XP, a version built on the Windows NT kernel that also retained the consumer-oriented usability of Windows 95 and its successors. This new version was widely praised in computer magazines.^[14] It shipped in two distinct editions, "Home" and "Professional", the former lacking many of the superior security and networking features of the Professional edition. Additionally, the first "Media Center" edition was released in 2002,^[15] with an emphasis on support for DVD and TV functionality including program recording and a remote control. Mainstream support for Windows XP will continue until April 14, 2009 and extended support will continue until April 8, 2014.^[16]

In April 2003, Windows Server 2003 was introduced, replacing the Windows 2000 line of server products with a number of new features and a strong focus on security; this was followed in December 2005 by Windows Server 2003 R2.

On January 30, 2007 Microsoft released Windows Vista. It contains a number of new features, from a redesigned shell and user interface to significant technical changes, with a particular focus on security features. It is available in a number of different editions, and has been subject to some criticism.

Timeline of releases

Release date	Product name	Version	Notes	Last IE
November 1985	Windows 1.01	1.01	Unsupported	-
November 1987	Windows 2.03	2.03	Unsupported	-
March 1989	Windows 2.11	2.11	Unsupported	-
May 1990	Windows 3.0	3.0	Unsupported	-
March 1992	Windows 3.1	3.1	Unsupported	5
October 1992	Windows For Workgroups 3.1	3.1	Unsupported	5
July 1993	Windows NT 3.1	NT 3.1	Unsupported	5
December 1993	Windows For Workgroups 3.11	3.11	Unsupported	5
January 1994	Windows 3.2 (released in Simplified Chinese only)	3.2	Unsupported	5
September 1994	Windows NT 3.5	NT 3.5	Unsupported	5
May 1995	Windows NT 3.51	NT 3.51	Unsupported	5
August 1995	Windows 95	4.0.950	Unsupported	5
July 1996	Windows NT 4.0	NT 4.0	Unsupported	6
June 1998	Windows 98	4.10.1998	Unsupported	6
May 1999	Windows 98 SE	4.10.2222	Unsupported	6
February 2000	Windows 2000	NT 5.0.3700.6690	Extended Support until July 13, 2010[17]	6
September 2000	Windows Me	4.90.3000	Unsupported	6
October 2001	Windows XP	NT 5.1.2600	Current for SP2 and SP3 (RTM and SP1 unsupported).	8
March 2003	Windows XP 64-bit Edition 2003	NT 5.2.3790	Unsupported	6
April 2003	Windows Server 2003	NT 5.2.3790	Current for SP1, R2, SP2 (RTM unsupported).	8
April 2005	Windows XP Professional x64 Edition	NT 5.2.3790	Current	8
July 2006	Windows Fundamentals for Legacy PCs	NT 5.1.2600	Current	-
November 2006 (volume licensing)/January 2007 (retail)	Windows Vista	NT 6.0.6000	Current. Version Changed to NT 6.0.6001 with SP1 (February 4th 08)	8
July 2007	Windows Home Server	NT 5.2.4500	Current	-
February 2008	Windows Server 2008	NT 6.0.6001	Current	8
2010 (planned)	Windows 7 (codenamed Blackcomb, then Vienna)	NT 7.0	Future release