But it requires a 80386 processor which is an outdated architecture so it is preferred to use dosbox to install Windows 3.1 along with a modern version of Windows such as Windows 10. Windows 3.1 was released back in April 1992, so it’s undoubtedly less spec hungry. Minimum System Requirements for Windows 3.1 ISO Windows 3.1 brought many improvements to the Windows MS-DOS codebase which included better performance and stability, better media support, Work Group Networks and True type fonts. It was a successor to the largely popular operating system by Microsoft, Windows 3.0. It was the first operating system of the Windows 3.1.x series and started selling in April 1992. Windows 3.1, also codenamed as Janus was a sixteen bit operating system which was developed and distributed by Microsoft to be used on home desktop computers. Type of setup: Offline/ Standalone Full setup.