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Windows NT 4.0

Not to be confused with Windows 4.0.

Windows NT 4.0
Version of the Windows NT operating system
Screenshot of Windows NT 4.0, showing the Start menu and Windows Explorer
DeveloperMicrosoft
Source modelClosed source
Released to
manufacturing		July 31, 1996 (1996-07-31)[1]
General
availability		August 24, 1996 (1996-08-24) (Workstation)
September 1996 (1996-09) (Server)[2]
Latest release4.0 SP6a with Post SP6a Security Rollup (Build 1381) / July 26, 2001 (2001-07-26)[3]
Marketing targetBusiness and Server
PlatformsIA-32, Alpha, MIPS, PowerPC
Kernel typeHybrid
UserlandWindows API, NTVDM, OS/2 1.x, POSIX.1, SFU (SP3+)
LicenseCommercial proprietary software
Preceded byWindows NT 3.51 (1995)
Succeeded byWindows 2000 (1999)
Official websiteweb.archive.org/web/20061216033317/http://www.microsoft.com/ntworkstation/default.asp (archived December 2006)
Support status
EmbeddedMainstream support ended on June 30, 2003[4]
Extended support ended on July 11, 2006[4]
ServerMainstream support ended on December 31, 2002[5]
Extended support ended on December 31, 2004[5]
WorkstationMainstream support ended on June 30, 2002[6]
Extended support ended on June 30, 2004[6]
Extended Security Updates (ESU) SupportAll editions were eligible for a paid Extended Security Updates (ESU) program. It allowed users to purchase security updates on a pay-per-incident plan. Security updates were available until December 31, 2006[7]

Windows NT 4.0 is a major release of the Windows NT operating system developed by Microsoft, targeting the data server and personal workstation markets.[8] It is the direct successor to Windows NT 3.51, and was released to manufacturing on July 31, 1996,[1] and then to retail in August 24, 1996, with the Server versions released to retail in September 1996.[2]

Its most prominent user-facing change was the adoption of Windows 95's user interface, introducing features such as the Start menu and taskbar to the Windows NT product line. It also includes various performance and stability improvements to system-level components, as well as new components such as a cryptography API, DCOM, TAPI 2.0, and the Task Manager, and limited support for DirectX. Over its support lifecycle, NT 4.0 received various updates and service packs offering patches, enhancements to its hardware support, and other new components. Two new editions of NT 4.0 were released post-launch, including a modular variant for embedded systems, and the Terminal Server edition. NT 4.0 was the last version of Windows NT to support RISC processors.

Most editions of NT 4.0 were succeeded by Windows 2000 on December 15, 1999. Mainstream support for Windows NT 4.0 Workstation ended on June 30, 2002, following by extended support ending on June 30, 2004. Windows NT 4.0 Server mainstream support ended on December 31, 2002, with extended support ending on December 31, 2004. Windows NT 4.0 Embedded would be succeeded by Windows XP Embedded; mainstream support ended on June 30, 2003, followed by extended support on July 11, 2006.[9][10][11]

  1. ^ a b "Microsoft Announces the Release of Windows NT Workstation 4.0". News Center. Redmond, WA: Microsoft. July 31, 1996. Archived from the original on August 5, 2019. Retrieved June 25, 2017.
  2. ^ a b "Microsoft sets support cutoff dates for Windows NT Server 4.0". Computerworld. December 10, 2001. Retrieved August 24, 2023.
  3. ^ "Post-Windows NT 4.0 Service Pack 6a Security Rollup Package (SRP)". Support. Microsoft. June 19, 2014. Archived from the original on June 28, 2017. Retrieved June 25, 2017.
  4. ^ a b "Microsoft Support Lifecycle for Windows NT Embedded 4.0". Microsoft. Archived from the original on February 3, 2015. Retrieved February 3, 2015.
  5. ^ a b "Microsoft Support Lifecycle for Windows NT 4.0 Server". Microsoft. Archived from the original on February 4, 2020. Retrieved September 4, 2009.
  6. ^ a b "Microsoft Support Lifecycle for Windows NT 4.0 Workstation". Microsoft. Archived from the original on February 4, 2020. Retrieved September 4, 2009.
  7. ^ Brandl, Dennis (December 1, 2006). "Goodbye Windows NT". Archived from the original on July 16, 2021. Retrieved October 21, 2020.
  8. ^ https://dspace.qau.edu.pk:8080/jspui/bitstream/123456789/29833/1/COM 1354.pdf
  9. ^ "Q&A: Support for Windows NT Server 4.0 Nears End; Exchange Server 5.5 to Follow in One Year". Stories. December 3, 2004. Archived from the original on April 23, 2022. Retrieved September 17, 2019.
  10. ^ "Windows NT 4.0 Support Ends Tomorrow". www.serverwatch.com. December 30, 2004. Archived from the original on September 26, 2020. Retrieved September 17, 2019.
  11. ^ Leyden, John (July 27, 2003). "Almost dead: Win NT 4 support". www.theregister.co.uk. Archived from the original on August 7, 2013. Retrieved September 17, 2019.

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