Windows NT 3.5 build 612

Windows NT 3.5 build 612.1 is the official Beta 1 release of Windows NT 3.5, available in the English and Japanese languages. You must either create a bootdisk to install this build or upgrade from Windows NT 3.1.

Changes

 * now shows the Windows flag inside of a real flag instead showing it natively.

Setup
There are huge changes to Setup:
 * This is the first known build to include the  launch parameter in   to install from an MS-DOS prompt.
 * The installation disc contains  for the first time to start Setup from within Windows NT.
 * can no longer be started from within Windows NT or 386 Enhanced Windows 3.xx or Windows/386 2.xx. Users of one of the both latter versions must exit Windows and start Setup from MS-DOS or IBM PC-DOS.
 * When starting text-mode Setup, it will warn about enhanced file system features for FAT and NTFS. When using these on Windows NT 3.1 a patch must be applied. This patch is included in further Service Packs for NT 3.1.
 * Setup now allows the user to manually select needed SCSI adapters instead of detecting them automatically.

NFO file
NFO contents