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.
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.
Download name | Version | Language | Architecture | File size | Downloads |
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3.1 (10-16-1991) Prerelease | English |
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13.15MB | 7 |
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3.10.239.1 SDK Prerelease | English |
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21.84MB | 2 |
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3.10.297 SDK Prerelease | English |
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45.24MB | 2 |
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3.10.328.1 SDK Prerelease | English |
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48.35MB | 6 |
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3.10.340 Prerelease | English |
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15.43MB | 3 |
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3.10.340.1 Lan Manager Prerelease | English |
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15.55MB | 1 |
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3.10.404 Prerelease | English |
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27.76MB | 3 |
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3.10.438 Prerelease | English |
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40.09MB | 2 |
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3.10.475 Prerelease | English |
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28.13MB | 1 |