Because this is considered (software no longer supported or sold by the manufacturer), it is primarily hosted on preservation sites:
: A popular site for vintage software that often hosts Windows NT 3.1 in compressed formats like .7z or .zip . Download Microsoft Windows Workstation (3 511 1) 7z"
: You can find various versions of Windows NT 3.1 (Build 511) in ISO or floppy disk image formats. Because this is considered (software no longer supported
To run this version on a modern PC, you will likely need an emulator like 86Box or PCem , as modern virtualization software (like VirtualBox or VMware ) often lacks the driver support needed for the older NT 3.1 kernel. Windows NT 3.51 build 1057.1 - BetaWiki Download Microsoft Windows Workstation (3 511 1) 7z"