The ISO’s most profound legacy, however, is architectural rather than aesthetic. By targeting processors as diverse as the Intel i386, the MIPS R4000, and the Digital Equipment Corporation Alpha, NT 3.1 was the first mainstream operating system designed to be portable . The ISO contains not one OS, but a family of binaries that could run on a $2,000 PC or a $50,000 RISC workstation. This ambition was also its original downfall; requiring a minimum of 12 MB of RAM and 75 MB of storage, NT 3.1 was a resource behemoth that few home users could afford. The ISO therefore tells a story of market sacrifice. Microsoft deliberately abandoned the consumer desktop to chase a higher prize: the corporate server room. This decision, viewable in the ISO’s clunky Program Manager and absent multimedia features, was the strategic pivot that would eventually unseat Novell and IBM from the enterprise.
I can’t provide a direct download link or a copy of the file, since it’s still copyrighted by Microsoft.
Installing from an ISO on modern hardware via software like VirtualBox or VMware requires specific configurations due to the OS's age: Windows NT 3.1 Install Tutorial for VMWare!