Installing DSCLIENT for Windows NT 4.0

In order for a Windows NT 4.0 computer to access the IMSS Active Directory, it is necessary to install the Active Directory Client Extension for Windows NT 4.0 software (also known as the DSClient), and make a change to the Registry to enable NTLMv2.

This webpage provides simple step-by-step instructions that detail how to install the client and make the necessary registry changes.

Prerequisites

In order to install the DSClient, the Windows NT 4.0 computer must be running:

  • Windows NT 4.0 Service Pack 6a
    This software can be downloaded directly from Microsoft's Website.
  • Internet Explorer 4.01 or later - However...
    IMSS highly recommends upgrading to Internet Explorer 6 Service Pack 1.
    This software can be downloaded directly from Microsoft's Website.

Where Can I Get The DSClient?

The DSClient software can be downloaded directly from Microsoft's Website.

Step-by-Step Installation Guide

  1. After you have prerequisite software installed on the Windows NT 4.0 computer, double-click to launch the downloaded Dsclient.EXE file to start the installation wizard.

  2. The self-extracting executable installation file will run and open the DSClient window. Read the license agreement and click the Yes button to continue with the installation.

  3. Click the Next button on the Directory Service Client Setup Wizard window to continue with the installation.

  4. Click the Next button to start the setup wizard. The wizard is now ready to install the Directory Services Client.

  5. The installation window below is the actual installation taking place.

  6. When installation is complete, an "Installation Completed" window will open. Click on the Finish button to complete the installation.

  7. At this point the installation is done. Click the Yes button on the System Settings Change pop up window to restart your system, in order for the changes made to take place.

  8. After your system has been restarted, verify that the DSClient software has been installed successfully by checking for it in Add/Remove Programs. Access it by selecting the "Start Menu", then "Run...", then "Settings", then "Control Panel", and then "Add/Remove Programs".

Enabling NTLMv2

You should now have restarted your system. You will now need to make a few additions to the Registry, in order to enable NTLMv2 authentication.

Please note: These instructions are based on a computer running the latest service pack, Windows NT 4.0 Service Pack 6a. This software can be downloaded directly from Microsoft's Website.

In order to enable NTLMv2 on a Windows NT 4.0 computer, you will need to make a few changes to the Registry.

Warning: Before you attempt to make any changes to the registry, please back it up and make sure you know how to restore if there is a problem afterward. See Microsoft's Knowledge Base article - 323170 - How To Backup, Edit, and Restore the Registry in Windows NT 4.0.

  1. Select the "Start Menu" and then select "Run...".

  2. In the "Run..." dialog box, type regedt32, then click the OK button to open the Registry Editor.

  3. The Registry Editor will open.

  4. Select the HKEY_LOCAL_MACHINE on Local Machine window, and then maximize the window for easier viewing.

  5. In the left hand window, expand "HKEY_LOCAL_MACHINE".

  6. In the left hand window, expand "SYSTEM".

  7. In the left hand window, expand "CurrentControlSet".

  8. In the left hand window, expand "Control".

  9. In the left hand window, expand "Lsa".
  10. In the right hand window, double-click the "LMCompatibilityLevel" registry DWORD Value.
  11. You will be presented with the "DWORD Editor" dialog box.
  12. In the "DWORD Editor" dialog box, change the Data: field to "5", make sure that "Hexadecimal" radio button is chosen for the Radix section, and then click the OK button.
  13. In the right hand window, the "LMCompatibilityLevel" setting should reflect the new value and the setting.
  14. Exit the Registry Editor by clicking on the Registry menu, and then select Exit.
  15. Please restart your computer.