Shell Technology Preview build 1057

Windows NT 3.51 build 1057 STP is an RTM version of Windows NT 3.51 build 1057 modified with the Shell Technology Preview. The Shell Technology Preview (also known as NewShell) is a replacement shell provided by Microsoft for testing and debugging Windows 95-compliant applications in Windows NT. The end result is an early version of the Windows NT 4.0 shell and user interface, complete with icons and some feature additions. It was made available to MSDN users and well as on CompuServe/Microsoft's website.

Two versions of NewShell exist, the latter fixing bugs in the original NewShell release. Both releases make Windows NT 3.51 identify as Windows NT 4.0.