Microsoft Windows NT 4.0 manual Microsoft Windows NT Server White Paper

Models: Windows NT 4.0

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Upgrading Windows NT 3.5x Server-based Profiles to Windows NT 4.0 Roaming Profiles

When you upgrade Windows NT 3.5x roaming profiles (.usr profiles), you do not need to change anything in the profile path configured in the user account. When the user logs on to a Windows NT 4.0-based machine and the profile is found to be a Windows NT 3.5x profile, a process automatically looks for the equivalent Windows NT 4.0 profile. If the profile isn’t found, a conversion proc- ess creates a new Windows NT 4.0 profile using the settings established in the Windows NT 3.5x profile.

During the conversion process, Windows NT 4.0 creates a directory for the new profile in the same location as the existing Windows NT 3.5x profile. The resulting directory has a .pds extension, which stands for Profile Directory Structure, rather than the previous Windows NT 3.5x .usr extension. For ex- ample, if the User Profile path for the Windows NT 3.5x user mydomainuser is \\myserver\myshare\mydomainuser.usr, and the user logs on to a Windows NT 4.0-based machine, the profile directory mydomainuser.pds would be created within \\myserver\myshare.

This approach allows the user to log on to the network from either a Windows NT 3.5x or 4.0-based workstation. If the user were to log on from a Windows NT 3.5x-based computer, the profile path would direct the Windows NT 3.5x-based machine to the User Profile used prior to the Windows NT 4.0 upgrade. If the user then moved to a Windows NT 4.0-based computer, the user’s Windows NT-based workstation would recognize that the profile contained Windows NT 3.5x syntax, would replace the .usr with .pds, and would then use that string to locate the Windows NT 4.0 profile. The re- sulting Windows NT 4.0 structure will be the Windows NT 3.51 profile (now NTuser.xxx) and the Default User Profile folders.

It is important to emphasize that the Windows NT 3.5x profile is not de- leted— it is still available to the user should they ever log on from a Windows NT 3.5x-based computer. It is also important to note that the settings for these two profiles are completely independent; changes made to the Windows NT 3.5x profile will not be reflected in the Windows NT 4.0 profile, and vice versa.

NOTE: As an administrator, if you review the directory structures in the share where users’roaming pro- files are stored, and no .pds or .pdm extensions are appended, this is normal. No extension is appended to roaming profile directories that are new to Windows NT 4.0. These extensions are only added when profiles are migrated from Windows NT 3.5x to 4.0, or when the administrator creates a new Windows NT 4.0 mandatory profile that requires a successful logon.

Upgrading Windows NT 3.5x Mandatory Profiles to Windows NT 4.0 Mandatory Profiles

Upgrades of Windows NT 3.5x mandatory profiles to Windows NT 4.0 cannot be done automatically. This is because the same restrictions that prevent a user from saving any changes to his or her profile also restricts the system’s ability to generate a new Windows NT 4.0 mandatory profile from an existing profile.

30 Microsoft Windows NT Server White Paper

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Microsoft Windows NT 4.0 manual Microsoft Windows NT Server White Paper

Windows NT 4.0 specifications

Microsoft Windows NT 4.0, released on July 29, 1996, marked a significant milestone in the evolution of Microsoft's operating systems. As the successor to Windows NT 3.51, this version brought a range of enhancements and features that appealed to both enterprise users and consumers.

One of the standout characteristics of Windows NT 4.0 was its introduction of the Windows 95 user interface, which significantly improved user experience and accessibility. This graphical interface made it easier for users to navigate the operating system, transitioning from the more complex interfaces of previous NT versions. The integration of familiar elements such as the Start menu and taskbar helped bridge the gap between professional and personal computing environments.

Windows NT 4.0 was built on a robust and secure architecture. It utilized the NT kernel, which provided improved multitasking and stability compared to its predecessors. This operating system was designed to handle multiple user sessions simultaneously, making it suitable for servers as well as workstations. The inherent stability of NT 4.0 made it a favorite in enterprise environments, particularly for critical applications and systems.

Another defining feature of NT 4.0 was its support for a wide range of hardware, making it versatile across various machine configurations. It included compatibility with numerous devices and peripherals, which facilitated its adoption in diverse settings.

In addition to user interface enhancements and hardware compatibility, Windows NT 4.0 introduced powerful networking capabilities. The operating system supported TCP/IP natively, alongside NetBEUI and IPX/SPX protocols. This meant that it could seamlessly integrate into existing network environments, providing essential services for file and printer sharing, domain management, and remote access through features like Remote Access Service (RAS).

Security was another key focus area for Windows NT 4.0. Built around security principles, it employed a discretionary access control system, allowing administrators to define user permissions and manage access to resources effectively. This was particularly appealing to businesses that needed to enforce strict security policies.

Windows NT 4.0 also included improved support for backup and recovery, through the inclusion of the NT Backup utility. The operating system allowed for the creation of scheduled backups and simplified data recovery processes, enhancing data integrity and reliability.

As NT 4.0 entered its later years, it laid the groundwork for future Windows operating systems, influencing the design of later versions, particularly Windows 2000. It combined user-friendly features with enterprise-level robustness, ultimately shaping expectations for modern operating systems across various industries.