Windows 3.1 build 101

Windows 3.1 build 101 is the Release Candidate 1 build of Windows 3.1. It is mentioned in an internal Microsoft document from 1992-02, and is also often reffered to as RC1 in other documents. A set of disks 2, 6, bug report disk, and test app disks of this build was found on eBay in 2018-09 and bought by user AirportsFan. Files from these disks confirm that build 101 is indeed the first release candidate of Windows 3.1.

According to the internal document, several third-party applications were tested on this build. It was released to testers on 1992-02-14.

File version
The file  from Windows for Workgroups 3.11.300 has version number , which hinted that RC1 of Windows 3.1 was build 101 before this was confirmed by the partial leak.