Windows NT 3.1 build 531

3.10.531.1
Build of Windows NT 3.1
Screenshot
OS familyWindows NT
Version number3.1
Build number531
Build revision1
Architecturex86, DEC Alpha, PC-98
Compiled on1994-01-24
SKUs
Workstation
Advanced Server
About dialog
WindowsNT3.1-JapaneseRTM-About.png

Windows NT 3.1 build 531 is the official Japanese RTM build of Windows NT 3.1. The free build for Alpha and the checked build for x86 is available on a MSDN CD from April 1994. BetaArchive member ReflectiaX showed the 3.5" 2HD floppy variation of this build's packaging for the NEC PC-9800 series computers.[1][2]

A Compaq OEM CD containing the free build for x86 in both client and Advanced Server SKUs was uploaded to the Internet Archive on 14 December 2021,[3] followed by a generic x86 release included as part of Tools Disc 1 of the Winter 1994 MSDN Systems and Tools disc set on 21 June 2024.[4]

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