Windows 3.1 RC2

Windows 3.1 RC2 is mentioned in an internal Microsoft document from February 1992. It is part of the Release Candidate stage and, like other RC builds except RC1, is not referred to by its actual build number, but is instead simply called "RC2". If it follows the same pattern as RC1, which is build 101, then its build number is probably 102.

According to the document, several third-party applications were tested on this build. It was also installed on some systems in buildings 8, 9, 16 and 21 on Microsoft campus in mid-February 1992. 78 installation attempts were performed, of which only 7 (roughly 9%) failed. Additionally, 11 users (or 15%) of successful installations experienced minor issues during or after installation.