This article was previously published under Q174840
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IMPORTANT: This article contains information about editing the registry.Before you edit the registry, make sure you understand how to restore itif a problem occurs. For information on how to do this, view the "Restoringthe Registry" online Help topic in Regedit.exe or the "Restoring a RegistryKey" online Help topic in Regedt32.exe.
You cannot disable the Lock Workstation, Change Password, or Task Managerbuttons 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 theMicrosoft Knowledge Base:
152734 How to Obtain the Latest Windows NT 4.0 Service Pack
WARNING: Using Registry Editor incorrectly can cause serious problems thatmay require you to reinstall Windows NT. Microsoft cannot guarantee thatproblems 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 AndValues" online Help topic in Registry Editor (Regedit.exe) or the "Add andDelete Information in the Registry" and "Edit Registry Data" online Helptopics in Regedt32.exe. Note that you should back up the registry beforeyou 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 above registry key is one path; it has been wrapped for readability.
Copy the updated version of Winnt.adm to the %SystemRoot%\Inf folder and then perform the following steps:
Start System Policy Editor (Poledit.exe).
On the file menu, click open registry, and then double-click Local User.
Double-click Windows NT System.
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.