Windows NT 4.0 build 1381.133

Windows NT 4.0 build 1381.133 is the Service Pack 4 release of Windows NT 4.0, which was released on 25 October 1998.

Changes

 * This service pack uses a new installer which also was used for Windows 98 SP1 and service packs for Windows 2000 until SP2.
 * ACPI capability has been added. On capable hardware, Windows NT is now able to use ACPI functions to turn off the computer.