Application May Hang Calling LogonUser() API

• Microsoft Windows NT Server version 4.0
• Microsoft Windows NT Server version 4.0, Terminal Server Edition
• Microsoft Windows NT Workstation version 4.0

SYMPTOMS

When running an application that calls LogonUser() from multiple threads, the second call to LogonUser may cause the application to hang. This occurs when the user context under which the application is running does not have the SE_TCB_NAME privilege.

NOTE: To set this privilege for a user, you can grant the user the advanced user right to "Act as part of the operating system," in User Manager under User Rights Policy.

RESOLUTION

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, please see the following article in the Microsoft Knowledge Base:

Q152734 How to Obtain the Latest Windows NT 4.0 Service Pack

STATUS

Microsoft has confirmed this to be 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.

Keywords : NT4SP4Fix kbbug4.00 kbfix4.00.sp4
Version : WINDOWS:4.0; WinNT:4.0
Platform : WINDOWS winnt
Issue type : kbbug