Windows NT 3.1 build 257

Build of Windows NT 3.1
OS familyWindows NT
Version number1.0
Build number257

Windows NT 3.1 build 257 is a build of Windows NT 3.1, which was mentioned in the file TEXTPERF.XLS from the Windows NT 3.5 build 782.1 source code. This build was being tested on 22 March 1992, so it was almost certainly compiled shortly before that.