Windows NT 3.5x

Windows NT 3.5x
Version of Microsoft Windows
Windows NT 3.5x Wordmark.svg
Windows-NT-3.51.1057.1-Desktop.png
OS familyWindows NT
Version3.5x
CodenameDaytona (3.5)
Preliminary name
Semester
Architecturex86 (IBM, PC98), Alpha, MIPS, PowerPC
Latest build3.51.1057.6 (Service Pack 5)
Release date1994-09-21 (3.5)
1995-05-30 (3.51)
Support end2001-12-31
2002-09-30 (Server 3.51)
SKUs
Workstation
Server
Replaces
Windows NT 3.1
Replaced by
Windows NT 4.0

Windows NT 3.5x is a family of NT-based operating systems released by Microsoft. These versions of Windows are the last of the NT series with the Windows 3.1-style user interface, as Windows NT 4.0 would introduce the Windows 95-style shell. These versions succeeded Windows NT 3.1.

Notably, an early version of the Windows 95-style shell is available for Windows NT 3.51 via the NewShell update. NewShell replaces Program Manager and adds a new desktop, taskbar, and user interface graphics. Windows NT 3.5x builds are known to install itself into the WINNT35 folder instead of WINNT. This change was reverted in Windows NT 4.0.

On 15 May 2020, the source code for Windows NT 3.5 build 782.1 was leaked.

This is the last version of Windows NT to be available in 3.5-inch floppy disks.

System requirements[edit | edit source]

According to Microsoft, the x86 version of Windows NT 3.5 and Windows NT 3.51 requires an 80386 processor, at least 16 MB of RAM, 95 MB of hard drive space, and a VGA or better display.[1]

Hardware compatibility[edit | edit source]

Windows NT 3.5 does not support processor generations higher than the original Pentium due to a faulty processor check during setup. Windows NT will state the processor as incompatible and abort setup without additional patching of setup files. Windows NT 3.51 fixes the aforementioned issue.

List of known builds[edit | edit source]

Windows NT 3.5[edit | edit source]

Windows NT 3.5 (codenamed Daytona) was released on 21 September 1994. It is the first version to feature the edition names of 'Workstation' (previously called simply "Windows NT") and 'Server' (previously called "Advanced Server"). It cannot be installed on a computer with a processor newer than the original Pentium without modifying setup files. A very rare PowerPC version is also known to exist, but it was downplayed in favor of advertising it on 3.51. (note that this edition and other Windows NT versions supporting PPC only support PReP PowerPC machines from IBM and others, not Macintosh machines that use OpenFirmware)

Beta 1[edit | edit source]

Beta 2[edit | edit source]

Release Candidate 1[edit | edit source]

Release Candidate 2[edit | edit source]

Pre-RTM[edit | edit source]

RTM[edit | edit source]

Post-RTM[edit | edit source]

Service Pack 1[edit | edit source]

Service Pack 2[edit | edit source]

Service Pack 3[edit | edit source]

Windows NT 3.51[edit | edit source]

Windows NT 3.51, released on 30 May 1995, is the first release of Windows NT to introduce PCMCIA support, NTFS file compression, replaceable GINA (exclusive to the Server SKU), 3D acceleration in OpenGL, Windows 95-styled common controls, as well as new versions of Sound Recorder, Media Player and Windows Help applications. It is the last Windows version to contain the Write word processor.

Beta[edit | edit source]

Release Candidate[edit | edit source]

RTM[edit | edit source]

Post-RTM[edit | edit source]

Service Pack 1[edit | edit source]

Service Pack 2[edit | edit source]

Service Pack 3[edit | edit source]

Service Pack 4 Beta[edit | edit source]

Service Pack 4[edit | edit source]

Service Pack 5[edit | edit source]

Shell Technology Preview[edit | edit source]

The Shell Technology Preview, also known as NewShell, was a hybrid mixture of the NT foundation and the Windows 95 shell, acting as a preliminary version of Windows NT 4.0. Support for the Briefcase functionalities were only available if the user had installed Service Pack 5 on top of the existing Windows installation.

The reported version will be changed to 4.0 if installed. Due to this, many applications which are capable to run on Windows NT 3.51 refuse to install or launch due to requiring NT 4.0 with a Service Pack installed, e.g. Office 97.

Two builds were made for the Shell Technology Preview, both of which are listed below, and were respectively compiled/released in May and August 1995:

References[edit | edit source]