Windows 95 build 57

Windows 95 build 57 is mentioned in the file  from Chicago build 58s SDK, along with build 58g.

// Build 58g chokes on LoadLibrary, so we'll have to disable it // workaround because LoadLibrary needs explicit .DRV extension in Build 57 strcpy(szDriverBuf, szDriver);
 * 1) if 0

The file  from build 58s also has the 4.00.57 version number.

Screenshot
An unconfirmed screenshot of this build was posted on BetaArchive, which shows the taskbar at the top of the screen by default, but its credibility can't be definitively established at this time.