Disabling Buttons in the Windows NT Security Dialog Box

You cannot disable the Lock Workstation, Change Password, or Task Manager buttons when you press CTRL+ALT+DELETE.

To resolve this problem, obtain the latest service pack for Windows NT 4.0 or Windows NT Server 4.0, Terminal Server Edition. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:


WARNING: Using Registry Editor incorrectly can cause serious problems that may require you to reinstall Windows NT. Microsoft cannot guarantee that problems resulting from the incorrect use of Registry Editor can be solved. Use Registry Editor at your own risk.

For information about how to edit the registry, view the "Changing Keys And Values" online Help topic in Registry Editor (Regedit.exe) or the "Add and Delete Information in the Registry" and "Edit Registry Data" online Help topics in Regedt32.exe. Note that you should back up the registry before you edit it.

After you apply the hotfix, perform one of the following:

• Run Regedt32.exe and add the following value(s) to the registry:
  
  
  • To disable the LOCK WORKSTATION button, create the following value in the registry:
    
    NOTE: The System key may need to be created.
    
    HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion \Policies\System\ DisableLockWorkstation = 1 (DWORD Hexadecimal value)
    
    NOTE: The above registry key is one path; it has been wrapped for readability.
  • To disable the CHANGE PASSWORD button, create the following value in the registry:
    
    NOTE: The System key may need to be created.
    
    HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion \Policies\System\ DisableChangePassword = 1 (DWORD Hexadecimal value)
    
    NOTE: The above registry key is one path; it has been wrapped for readability.
  • To disable the TASK MANAGER button, create the following value in the registry:
    
    NOTE: The System key may need to be created.
    
    HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion \Policies\System\ DisableTaskMgr = 1 (DWORD Hexadecimal value)
    
    NOTE: The above registry key is one path; it has been wrapped for readability.
  
  
  -or-
• Copy the updated version of Winnt.adm to the %SystemRoot%\Inf folder and then perform the following steps:
  1. Start System Policy Editor (Poledit.exe).
  2. On the file menu, click open registry, and then double-click Local User.
  3. Double-click Windows NT System.
  4. The new options appear as:
     
     
     • Disable Lock Workstation
     • Disable Change Password
     • Disable Task Manager

Microsoft has confirmed that this is a problem in Windows NT 4.0 and Windows NT Server 4.0, Terminal Server Edition. This problem was first corrected in Windows NT 4.0 Service Pack 4.0 and Windows NT Server 4.0, Terminal Server Edition Service Pack 4.