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Upgrades in a Windows NT 4.0 Domain

Updated: January 21, 2005

Applies To: Windows Server 2003, Windows Server 2003 R2, Windows Server 2003 with SP1, Windows Server 2003 with SP2

Upgrades in a Windows NT 4.0 domain

This section provides information about upgrading servers in a Windows NT 4.0 domain, that is, a domain where all domain controllers run Windows NT 4.0. The guidelines provided are for a network with one to five servers and 100 or fewer clients (the size of network discussed in these Getting Started topics). For information about upgrading servers in a domain where one or more domain controllers run Windows 2000, see Upgrades in a domain containing Windows 2000 domain controllers.

The following list describes the topics about upgrading servers in a Windows NT 4.0 domain:


  • If you have servers or client computers that run Windows NT 3.51, it is recommended that you install or upgrade to a newer operating system on all these computers, or retire them from operation. If you have more than one domain, you must upgrade domain controllers running Windows NT 3.51 for reliable logon validation. In any case, upgrading or retiring computers running Windows NT 3.51 strengthens security and reduces the number of version differences between computers, simplifying management and troubleshooting.


  • The Internet Explorer Enhanced Security Configuration is enabled by default when you upgrade. The security settings in this configuration can help make your computer more secure by limiting its exposure to malicious Web sites. Therefore, with this enhanced level of security, you might find that some Web sites do not display correctly in Internet Explorer when you are browsing Internet and intranet Web sites. Also, you might be prompted to enter your credentials when accessing network resources, such as files in Universal Naming Convention (UNC) shared folders. You can easily change the enhanced security settings. For more information, see Internet Explorer Enhanced Security Configuration overview.

For additional information, see:

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