Windows 3.1 RC3f

Windows 3.1 RC3f is mentioned in an internal Microsoft document from 1992-02. It is part of the Release Candidate stage and, like other RC builds, is not referred to by its actual build number, but is instead simply called "RC3f" everywhere.

According to the document, several third-party applications were tested on this build. Additionally, the following issues with this build were observed:

KRNL -  Basically, if you only have 260-330K free on any 1 MB system, Setup might die WRITE.EXE - OLE 1.0 OleActivate call, #15437 SETUP.EXE   minor change to wording for new /C switch (don't do TSR detection) WTKFILE.EXE - File manager change for Novell net folders, take out net icon on folder GENDRV.DLL - Fixes for IPG. Color matching on a pe printer MCISEQ.DRV - mmbug 6515, Executing MIDI sequencer get info command causes crash
 * GDI.EXE - Bug# 15236 - RemoveFontResource font file not found
 * WIN386.EXE - Bug# 15304, Problem with FoxPro, random pointer in VMM