Windows NT 3.1 build 511

Windows NT 3.1 build 511.1 is the original RTM build of Windows NT 3.1, which was released on 27 July 1993.

Changes from build 475

 * During the file copy stage in GUI Setup, the dialog with the progress bar has been moved to the lower-right corner. In the upper-left corner, there are now billboards showing the features and advantages of Windows NT as well as a reminder to register at Microsoft.

OS Loader

 * The message during boot to press the Spacebar to initialize the Last Known Good Configuration/Hardware Profile menu has been altered.
 * The menu entry to load a previous installed system from the C drive has been removed, letting Windows NT directly boot.

Processor check
Setup doesn't detect processors newer than the original Pentium, as well as some models of 386, 486, and Pentium processors. To bypass this, two INF files must be edited after the first stage (in text mode) of setup is done. Change the line  to   in   and   files in the   subdirectory of the target installation directory. If you're doing this on a 386 processor use I386, and for 486 processor use I486 instead of I586.

File differences
The following files have been introduced or removed compared to build 475: