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Q291815: Program Running in a Terminal Server Session May Hang

Article: Q291815
Product(s): Microsoft Windows NT
Version(s): 4.0,4.0 SP4,4.0 SP5,4.0 SP6
Operating System(s): 
Keyword(s): kbWinNT400PreSP7Fix
Last Modified: 08-MAY-2002

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The information in this article applies to:

- Microsoft Windows NT Server versions 4.0, 4.0 SP4, 4.0 SP5, 4.0 SP6, Terminal Server Edition 
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SYMPTOMS
========

A program that is running in a terminal server session may stop responding
(hang).

CAUSE
=====

In rare instances, a thread in Win32k.sys may enter an endless loop while
looking for a window. The amount of kernel time for this program will be very
high and continue to increase because the thread is almost always actively
running in the kernel.

RESOLUTION
==========

A supported fix is now available from Microsoft, but it is only intended to
correct the problem described in this article and should be applied only to
systems experiencing this specific problem. This fix may receive additional
testing at a later time, to further ensure product quality. Therefore, if you
are not severely affected by this problem, Microsoft recommends that you wait
for the next Windows NT 4.0 service pack that contains this fix.

To resolve this problem immediately, contact Microsoft Product Support Services
to obtain the fix. For a complete list of Microsoft Product Support Services
phone numbers and information about support costs, please go to the following
address on the World Wide Web:

  http://support.microsoft.com/default.aspx?scid=fh;EN-US;CNTACTMS

NOTE: In special cases, charges that are normally incurred for support calls may
be canceled, if a Microsoft Support Professional determines that a specific
update will resolve your problem. Normal support costs will apply to additional
support questions and issues that do not qualify for the specific update in
question.

The English version of this fix should have the following file attributes or
later:

  Date       Time      Size       File name   Platform
  ----------------------------------------------------
  3/27/2001  12:20 PM    170,256  Gdi32.dll   Intel
  7/11/2000  2:10 PM      47,456  User.exe    Intel
  7/11/2000  5:44 PM     331,536  User32.dll  Intel
  4/12/2001  10:35 AM  1,279,824  Win32k.sys  Intel
  3/01/2001  6:19 PM     195,856  Winsrv.dll  Intel

NOTE: Because of file dependencies, this hotfix requires Microsoft Windows NT 4.0
Service Pack 6.



STATUS
======

Microsoft has confirmed this to be a problem in the Microsoft products that are
listed at the beginning of this article.


Additional query words:

======================================================================
Keywords          : kbWinNT400PreSP7Fix 
Technology        : kbWinNTsearch kbWinNT400search kbWinNTSsearch kbWinNTS400search kbNTTermServ400 kbNTTermServ400sp4 kbNTTermServ400sp5 kbNTTermServ400sp6 kbNTTermServSearch
Version           : :4.0,4.0 SP4,4.0 SP5,4.0 SP6
Hardware          : ALPHA x86
Issue type        : kbbug
Solution Type     : kbfix

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