Build 34 is one of the earliest confirmed builds of Windows 95. It is mentioned in OLDSETUP.INF from later Chicago builds (e.g. 58s).
; ; Remove these as of build 34. Were reverting back to Win 3.1 Comm support. ;
The file also contains the following line:
;!:README.EF removed for M32 external release. MC.
OLDSETUP.INF is a remnant of previous Chicago builds, together with SETUP31.VER, SETUP31.EXE, SETUP31.INF and OLDSETUP.BAT. It gives a pretty good insight into the installation process of pre-58s builds. These files indicate that early Chicago setup was merely a rebranded Windows 3.1x setup and did not include major changes or new features. The new setup was likely introduced in the 5x range.
Early leaked builds also include the old Windows 3.1x-like bootscreen, SYSLOGO.RLE, which is also a leftover from previous builds and was likely used in build 34.
Information from antitrust documents
Microsoft Antitrust document PX05549 claims there was an early PDK from M3 stage sent to 40 ISVs in March 1993. The build supposedly had "Win32s level support for 32-bits" and lacked the new shell (Chicago Shell/Explorer). According to PX05651, "M3 prebeta MS release" was made on 22nd January 1993. The first PDK release, mentioned above, is now referred to as "M32" and was supposedly released on 8th March 1993.
Judging by the information gathered from OLDSETUP.INF and the antitrust documents, it appears build 34 could be the M3/M32 external release from early March 1993 that was sent to a few people, which means it would be compiled in February or early March 1993.
YouTube video
There is also a video claimed to be of this build by George Wolfowitz. As this build remains unleaked, the authenticity of the video can't be confirmed, though it's considered pretty accurate in regards to other information available about early development of Chicago.
Fake screenshots
Several screenshots of this build were posted by betaguy224 but they were proven to be fake by the Usability Testing builds.
