|A version of the Windows NT operating system|
|Windows NT 4.0's Active Desktop Update
displaying its desktop, taskbar, and quick launch bar.
|Source model||Closed source|
|July 31, 1996; 22 years ago|
|General availablity||August 24, 1996; 22 years ago|
|Latest release||Service Pack 6a|
October 21, 2002; 16 years ago
|Platforms||IA-32, Alpha, MIPS, PowerPC|
|License||Commercial proprietary software|
|Preceded by||Windows NT 3.51 (1995)|
|Succeeded by||Windows 2000 (1999)|
|Embedded||Mainstream support ended on June 30, 2003
Extended support ended on July 11, 2006
|Server||Mainstream support ended on December 31, 2002
Extended support ended on December 31, 2004
|Workstation||Mainstream support ended on June 30, 2002
Extended support ended on June 30, 2004
Windows NT 4.0 is a preemptively multitasked, graphical operating system, designed to work with either uniprocessor or symmetric multi-processor computers. It was part of Microsoft's Windows NT line of operating systems and was released to manufacturing on July 31, 1996 and was released for retail sale on August 24, 1996. It is a 32-bit Windows system available in both workstation and server editions with a graphical environment similar to that of Windows 95.
- The last version of Windows Media Player to run on Windows NT 4.0 is Windows Media Player 7.
- The last version of Internet Explorer to run on Windows NT 4.0 is Internet Explorer 6 SP1.
- The last version of Microsoft Office to run on Windows NT 4.0 is Office XP.
|Service pack||Release date|
|Service Pack 1 (SP1)||October 16, 1996|
|Service Pack 2 (SP2)||December 14, 1996|
|Service Pack 3 (SP3)||May 15, 1997|
|Service Pack 4 (SP4)||June 25, 1998|
|Service Pack 5 (SP5)||October 31, 1999|
|Service Pack 6 (SP6)||December 28, 2000|
|Service Pack 6a (SP6a)||July 26, 2001|
Microsoft released Windows NT 4.0 service packs primarily to fix bugs. Windows NT 4.0, during its lifecycle, had several service packs, as well as numerous service rollup packages and option packs. The last full service pack was Service Pack 6a (SP6a).
A SP7 was planned at one stage in early 2001, but this became the Post SP6a Security Rollup and not a full service pack, released on July 26, 2001, 16 months after Windows 2000 and nearly three months prior to Windows XP.