At 32MB, Windows NT 4.0 Service Pack 4 was released on October 22, 1999. It collected the latest fixes for Windows NT 4.0 Server and Windows NT 4.0 Workstation at the time. In addition, Service Pack 4 included the latest Year 2000 updates, as well as support for the Euro currency. SP4 also contained a number of new components, which added functionality to the Windows NT platform, including:
- Security Enhancements
- Security Configuration Manager
- Remote Winsock
- Distributed Computing Improvements
- Windows Management Instrumentation
- DCOM/HTTP Tunneling
- Tapi 2.1
- Operating System Functionality
- Windows Media Technologies
- Internet Explorer 4.01 SP1
| Windows NT 4.0 Service Pack List |
| Windows NT 4.0 Service Pack List: SP1 | SP2 | SP3 | SP4 | SP5 | SP6 | SP6a |