Windows NT 3.x NT 3.1 Pre-Release

Windows NT 3.1 was the first of the Windows NT series. Sporting the same face as its consumer counterpart Windows 3.1, it was completely different under the hood. A true 32-bit native operating system, Windows NT descended from the work Microsoft did while collaborating with IBM on OS/2 after the great split, and bringing in former DEC employees like Dave Cutler, bringing a VMS influence into the system. It was followed up by Windows NT 4.0.


Screenshots

Release notes

These builds are early pre-releases, that lead up to the final NT 3.1. They are ocasionally referred to as "NT OS/2", as the core technology was developed by Microsoft for use in future IBM OS/2 products. However, after the IBM-MS split, it became "Windows", and is branded as such.

The very first builds are visibly little more than the Win16 API and Windows 3.x GUI ported to a 32-bit system.

Product type
OS
Vendor
Microsoft
Release date
1991
Minimum CPU
386
User interface
GUI
Platform
Windows
Download count
290 (27 for release)

Downloads

Download name Version Language Architecture File size Downloads
Microsoft Windows NT 3.1 (10-16-1991) October 1991(ISO) 3.1 (10-16-1991) Prerelease English 13.15MB 7
Microsoft Windows NT 3.1 (3.10.239.1) (12-20-1991) SDK (ISO) 3.10.239.1 SDK Prerelease English 21.84MB 2
Microsoft Windows NT 3.1 (3.10.297) (6-28-1992) SDK (ISO) 3.10.297 SDK Prerelease English 45.24MB 2
Microsoft Windows NT 3.1 (3.10.328.1) (10-12-1992) SDK (ISO) 3.10.328.1 SDK Prerelease English 48.35MB 6
Microsoft Windows NT 3.1 (3.10.340) (10-12-1992) (3.5-1.44mb) 3.10.340 Prerelease English 15.43MB 3
Microsoft Windows NT 3.1 (3.10.340.1) (10-12-1992) Lan Manager (3.5-1.44mb) 3.10.340.1 Lan Manager Prerelease English 15.55MB 1
Microsoft Windows NT 3.1 (3.10.404) (3-7-1993) (ISO) 3.10.404 Prerelease English 27.76MB 3
Microsoft Windows NT 3.1 (3.10.438) (4-22-1993) (ISO) 3.10.438 Prerelease English 40.09MB 2
Microsoft Windows NT 3.1 (3.10.475) (6-9-1993) (3.5-1.44mb) 3.10.475 Prerelease English 28.13MB 1

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