Final answer:
MS Windows 3.1 was released on April 6, 1992, and was a major update in the Microsoft Windows series, introducing new multimedia support and features.
Step-by-step explanation:
MS Windows 3.1 was officially released on April 6, 1992. It was a significant update to the Microsoft Windows operating system series, providing a more stable platform and introducing several new features such as improved support for multimedia applications, object linking and embedding (OLE), and the ability to run MS-DOS programs in a window. This version of Windows represented a major step forward in graphical user interfaces during the early '90s and contributed greatly to Microsoft's dominance in the personal computer market.