Windows NT 3.1 build 511

Windows NT 3.1 build 511.1 is the RTM of Windows NT 3.1, released in 1993-07. Support for the Alpha architecture was not ready yet, so it's not included in this build.

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.