Microsoft KB Archive/137426

= Program Manager Disappears After Log On, Log Off or Shutdown =

Article ID: 137426

Article Last Modified on 11/1/2006

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APPLIES TO


 * Microsoft Windows NT Workstation 3.51
 * Microsoft Windows NT Server 3.51

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This article was previously published under Q137426



SYMPTOMS
One or both symptoms may occur in Windows NT 3.51:


 * When you log on, log off, or shut down Windows NT, Program Manager does not appear, or disappears. When you press CTRL+ALT+DEL, the Windows NT Security dialog box does not appear. Network connections to the Windows NT computer can still be made.
 * Program Manager disappears and is not in the task list. Programs already started are functional and network connections to the Windows NT computer can be made.



CAUSE
This problem occurs when the following events occur:

- Process A creates cursor

- Process B references cursor

- Process A exits

The cursor still points to the freed pointer of process A. If the freed pointer is uncommitted, any call to FindExistingCursorIcon results in memory access violation and the calling process is halted.



RESOLUTION
To correct this problem, install the latest U.S. Service Pack for Windows NT version 3.51.



STATUS
Microsoft has confirmed this to be a problem in Windows NT version 3.51. This problem has been corrected in the latest U.S. Service Pack for Windows NT version 3.51. For information on obtaining the Service Pack, query on the following word in the Microsoft Knowledge Base (without the spaces):

S E R V P A C K

Additional query words: prodnt

Keywords: KB137426

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