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Welcome to the Microsoft® Windows NT® Server download page. Our goal is to provide you with easy access to all the latest updates and feature enhancements to your Windows NT Server systems. This page contains all recommended updates as well as new features, tools, device drivers, evaluation packages, and other downloads. On this page, you will find downloads for:

  • Windows NT Server 4.0 (including Enterprise Edition).
  • Windows NT Server 4.0, Terminal Server.
WINDOWS NT SERVER 4.0
CRITICAL UPDATES
Security Update, July 18, 2000  
This update resolves the "Remote Registry Access Authentication" vulnerability in Windows NT 4.0. Installing this update prevents a malicious user from remotely accessing your computer's registry and causing Windows NT 4.0 to fail. This vulnerability could only be exploited under very specific conditions, and the malicious user would need to have an authorized account and password for remote logon to your computer.
Critical Update, June 15, 2000  
This update resolves the "High Encryption Configuration Prevents Outlook Express Replies" issue in some Windows NT 4.0 computers. A Windows NT 4.0 computer is only vulnerable if it is configured with 128-bit encryption and the Input Locale is set to French. If a computer with this configuration receives an Outlook Express e-mail message from a computer with 56-bit encryption, replying to this e-mail message may cause the computer with 128-bit encryption to stop responding.
Security Update, June 6, 2000  
This update resolves the "ResetBrowser Frame" and "HostAnnouncement Flooding" security vulnerabilities in Windows 2000 and Windows NT 4.0. Installing this update will prevent a malicious user from denying network users the ability to locate services or other computers on the network. Without this update, the malicious user may also be able to provide inaccurate information to network users.
Security Update, May 19, 2000  
This update resolves the "IP Fragment Reassembly" security vulnerability in Windows NT 4.0. Installing this update will minimize the negative effects that fragmented Internet Protocol (IP) datagrams could have on your computer's central processing unit (CPU). IP datagrams are a necessary part of network and Internet communication. If a continuous stream of fragmented IP datagrams with a particular malformation were sent to an affected computer, it could be made to devote most or all of its CPU availability to processing these fragments. The vulnerability does not allow a malicious user to compromise data on the computer or take administrative control over it.
Security Update, April 17, 2000  
This update eliminates the "Malformed TCP/IP Print Request" vulnerability found in the TCP/IP Printing Services for Windows NT 4.0 and Windows 2000 (in Windows 2000, the service is referred to as "Print Services for Unix"). This is an optional service used primarily in mixed Windows NT-Unix environments, and is not installed by default. Installing this update will prevent a malicious user from disrupting printing services on a network that has installed TCP/IP Printing Services. The native Windows NT and Windows 2000 printing service is not affected by this vulnerability.
Security Update, April 13, 2000  
This update eliminates the "Malformed Hit-Highlighting Argument" security vulnerability. Download now to prevent a malicious Web surfer from viewing files on your computer.
Critical Update, March 3, 2000  
Update for Web Connections using SGC. Unable to connect to Web sites using Server Gated Cryptography (SGC)? Some computers may be unable to connect to Web servers using SGC for strong encryption when a secure connection is required. Installing this update will eliminate these connection failures.
Security Update, January 17, 2000  
This update will eliminate the "Malformed RTF Control Word" vulnerability. With this update, you can prevent a malicious user from sending a specially malformed e-mail and crashing your e-mail reader.
Security Update, September 30, 1999  
This update eliminates two security vulnerabilities in Internet Explorer: 1) ImportExportFavorites Issue and 2) Unsafe ActiveX Controls. Installing this update will prevent a web site operator from writing malicious files to your computer and, it will also prevent a web site from running several unsafe ActiveX controls without your permission.
| Posted 30 September 99
Security Update, September 7, 1999  
Update for Security Vulnerabilities in "Scriptlet.typlib" and "Eyedog" ActiveX Controls. This update eliminates the "scriptlet.typlib/eyedog" security vulnerability. Without this update, the ActiveX controls, scriptlet.typlib and eyedog, can be maliciously used to perform unauthorized actions on a user's computer.
| Posted 07 September 99
RECOMMENDED UPDATES
Windows NT 4.0 Service Pack 6a  
Service Pack 6a (SP6a) resolves the SP6 issue with Lotus Notes and other Winsock based applications and provides the latest updates to Microsoft® Windows NT® Workstation 4.0 and Windows NT Server 4.0 (including Enterprise Edition). SP6a contains known Year 2000 updates for Windows NT 4.0. These Year 2000 updates are also available as separate Web downloads that customers may apply to a Service Pack 4 system.
| Posted 4 May 99
Internet Explorer 5.01  
Windows NT 4.0 Resource Kit Support Tools  
Provides tools to help you support, administer, and troubleshoot the Windows NT Server 4.0 and Windows NT Workstation 4.0 platforms.
NETDDE.EXE Update  
Provides a fix for remote clients in a Dynamic Data Exchange (DDE) conversation with a server computer running Windows NT 4.0 with Service Pack 4 or Service Pack 5.
Security Configuration Manager  
Allows system administrators to consolidate all security related system settings into a single configuration file. (This requires Service Pack 5 or Service Pack 4.)
Internet Explorer Service Pack 2  
Addresses the top product support issues in Internet Explorer 4.0x, including Year 2000 issues.
Dial-Up Networking 1.3 Performance & Security Upgrade for Windows 95  
Provides additional features for Microsoft Windows® 95 Dial-Up Networking, improving performance, reliability, and security.
2.2 MB | 18.3 Minutes @ 28.8 | Posted 28 August 98
Dial-Up Networking Security Upgrade for Windows 98  
Provides enhanced protection of both dial-up and virtual private network (VPN) connections by strengthening password management and data encryption.
2.2 MB | 18.3 Minutes @ 28.8 | Posted 28 August 98
Windows Library Update  
This update resolves an issue that can cause third party software to behave unexpectedly.
| Posted 23 December 98
Update for Allowing Blank Passwords from Earlier Versions of Clients for Windows NT 4.0  
Fix for allowing blank passwords from downlevel clients for Windows NT 4.0
| Posted 01 February 99
Windows NT 4.0 Option Pack  
Windows NT 4.0 Service Pack 5  
Service Pack 5 (SP5) provides updates to Microsoft Windows NT Workstation 4.0 and Windows NT Server 4.0 (including Enterprise Edition). SP5 contains known Year 2000 updates for Windows NT 4.0. These Year 2000 updates are also available as separate Web downloads that customers may apply to a Service Pack 4 system. All SP5 updates are included in SP6a.
| Posted 4 May 99
Windows NT 4.0 Service Pack 4 (SP4)  
Provides improved management, security, and availability capabilities for Windows NT Server 4.0 and helps IT professionals prepare their networks for the Year 2000 and euro currency changes. This service pack applies to Windows NT Workstation 4.0 and Windows NT Server 4.0 (including Enterprise Edition). All SP4 updates are included in SP5 and SP6.
32.7 MB | 4.55 Hours @ 28.8 | Posted 21 October 98
Windows NT 4.0 Post Service Pack 4 Hotfix Rollup  
This update combines many of the Windows NT 4.0 Post-Service Pack 4 hotfixes into one self-installing package. These hotfixes are included in SP5.
| Posted 17 August 99
WINDOWS NT SERVER FEATURES
Microsoft Distributed File System Version 4.1  
Provides tools to create a directory tree that shows a logical organization of network resources.
0.38 MB | 3.21 Minutes @ 28.8 | Posted 30 July 97
Microsoft Internet Locator Server Version 2.0  
Provides a dynamic directory service allowing users to easily locate others online and facilitate real-time communication on the Internet and intranets.
Microsoft Windows NT Load Balancing Service (WLBS)  
Provides the ability to scale IP-based services across up to 32 Windows NT systems and seamlessly work through both planned and unplanned downtime.
0.95 MB | 7.98 Minutes @ 28.8 | Posted 20 January 99
MANAGEMENT AND DEPLOYMENT TOOLS
Uptime Reliability and Availability Information Tool  
Provides a tool to analyze a single server for reliability and availability information.
Zero Administration Kit  
Provides tools to simplify and centralize policy-based management.
Site Server Express 3.0  
Windows NT Server Management Tools for Windows 95  
Provides tools to manage Windows NT Server 4.0 from a Windows 95 desktop.
1 MB | 8.33 Minutes @ 28.8 | Posted 25 October 95
Web Administrator 2.0 for Microsoft Windows NT Server 4.0  
Provides tools to administer your Windows NT Server network using a browser when you're away from your workstation.
1.7 MB | 14.1 Minutes @ 28.8 | Posted 24 April 98
ARCHIVE
Windows NT 4.0 Service Pack 3  
Provides components to enhance Microsoft Internet Information Server. All improvements in Service Pack 3 are also included in Service Pack 4.
17.1 MB | 2.38 Hours @ 28.8 | Posted 1 September 98
Windows NT 4.0 Post Service Pack 3 (SP3) Year 2000 Update  
Provides critical Y2K updates for users of Service Pack 3 for Windows NT 4.0.
| Posted 17 February 99
Microsoft Euro Currency Support for Windows NT 4.0  
Provides the euro currency symbol support to the Microsoft Windows NT 4.0 operating system. This is included in Service Pack 4.
1.36 MB | 11.3 Minutes @ 28.8 | Posted 4 May 98
Quick Fix Engineering (QFE) Update for Windows NT Server Option Pack  
Provides a fix for problems in the Windows NT Server Option Pack version 4.0. This fix is included in Service Pack 4.
1.2 MB | 10 Minutes @ 28.8 | Posted 8 September 98
Windows NT 4.0 Performance & Security Upgrade  
Provides several enhancements for Remote Access Service (RAS) and Point to Point Tunneling Protocol (PPTP).
Routing and Remote Access Service Performance and Security Upgrade (Hotfix 3.0)  
Provides changes from hotfix 1.0 and 2.0 for Routing and Remote Access Service and incorporates security enhancements. This is included in Service Pack 4.
Client 32 Support for NetWare  
Allows NetWare customers with Novell's 32-bit clients to access and use services on Microsoft Windows NT Server 4.0. This is included in Service Pack 4.
0.26 MB | 2.22 Minutes @ 28.8 | Posted 15 October 96
Microsoft Internet Information Server 3.0  
Provides Internet Information Server 3.0. (The latest version is IIS 4.0 but requires Windows NT Server 4.0.)
Internet Information Server - ActiveX Server Components - Registry Access 1.0  
Provides access to the registry keys on a local or remote machine.
0.22 MB | 1.84 Minutes @ 28.8 | Posted 16 April 98
Internet Information Server - ASP Scripts - Debugging Script 2.0  
This script uses the VBScript For...Each statement to dump the values within various ASP built-in object collections.
0.13 MB | 1.10 Minutes @ 28.8 | Posted 16 April 98
Internet Information Server Utilities - IDC/HTX to Active Server Pages Conversion 1.0  
This software enables you to convert IDC/HTX projects to Active Server Pages running under IIS 3.0.
0.82 MB | 6.89 Minutes @ 28.8 | Posted 16 April 98
APPLICATION SERVICES
MANAGEMENT
Microsoft Message Queue Server Developer Resources  
Provides tools to implement Microsoft Message Queue Server (MSMQ) as well as samples demonstrating how to use it.
WINDOWS NT SERVER TERMINAL SERVER EDITION
RECOMMENDED DOWNLOADS
Service Pack 6 for Terminal Server  
Service Pack 6 (TSE SP6) provides the latest updates to Microsoft Windows NT Server 4.0 Terminal Server Edition. TSE SP6 is based on Service Pack 6a for Windows NT Server 4.0 and contains additional updates for Terminal Server. TSE SP6 is not a required upgrade; Microsoft recommends that each customer consult the TSE SP6 documentation and then determine whether to deploy it.
Service Pack 5 for Terminal Server  
Service Pack 5 (TSE SP5) for Microsoft Windows NT Server 4.0 Terminal Server Edition contains known Year 2000 updates for Windows NT 4.0. These Year 2000 updates are also available as separate Web downloads that customers may apply to a Service Pack 4 system. Providing these options gives organizations the flexibility to choose which path is easier for them to address Year 2000 issues. TSE SP5 is not a required upgrade for Year 2000; Microsoft recommends that each customer consult the TSE SP5 documentation and then determine whether to deploy it. All TSE SP5 updates are included in TSE SP6.
Service Pack 4 for Terminal Server  
Service Pack 4 (TSE SP4) for Microsoft Windows NT Server 4.0 Terminal Server Edition provides improved management, security, and availability capabilities and helps prepare IT professionals for the Year 2000 and euro currency changes. All TSE SP4 updates are included in TSE SP5 and TSE SP6.
ADMINISTRATION TOOLS AND ACCESSORIES
Terminal Server Release Notes  
Provides general technical information, application notes, and detailed instructions for installing Windows NT Server 4.0, Terminal Server Edition.
0.04 MB | 0.35 Minutes @ 28.8 | Posted 1 June 98
Zero Administration Kit for Terminal Server  
Allows system administrators to limit end-user access to system files and unauthorized applications, resulting in fewer help desk calls.
0.08 MB | 0.70 Minutes @ 28.8 | Posted 1 January 98
OTHER DOWNLOADS
Year 2000 Update for Windows NT 4.0, Terminal Server Edition  
Provides critical Y2K updates for users of Service Pack 3 for the Windows NT 4.0 operating system. This is included in SP4 for Terminal Server.
Euro Currency Support for Terminal Server  
Provides euro currency symbol support allowing for correct use of the new European currency. This is included in SP4 for Terminal Server.
2.3 MB | 19.1 Minutes @ 28.8 | Posted 3 December 98

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