Windows 3.1 build 048

Windows 3.1 build 048 is an unleaked debug build of Windows 3.1. The build number is referenced in the file  on the CD for the September 1992 edition of Microsoft MSDN Development Network.

DRIVINIT.H
System Info (info) Windows version 3.10 Debug build        # The debugging version of Windows was running. Windows Build 3.1.048        # This is an internal Microsoft build of Windows, #48. Username Unknown User        # Your name here Organization Unknown Organization        # Your organization here System Free Space 7131008 Stack base 1122, top 9164, lowest 7504, size 8042        # Stack size of current task