"Stop 0x50" in Win32k.sys with Windows NT Terminal Server Edition (262956)


The information in this article applies to:

  • Microsoft Windows NT Server 4.0 Terminal Server Edition
This article was previously published under Q262956

SYMPTOMS

When you are running Windows NT Server 4.0, Terminal Server Edition, on high-capacity servers, you may receive a "Stop 0x50" error message in Win32k.sys sporadically.

CAUSE

While it is walking through the buffer backwards, the code accesses memory beyond the end of the area allocated. This occurs only when the font that is currently being rendered is very small.

Another cause for the "Stop 0x50" error message is that for each desktop there is a buffer that is used to convert raw keyboard input to a format that can be sent to a window in a message. When there are many keystrokes in the queue, writing may occur past the end of the buffer.

RESOLUTION

A supported fix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Apply it only to computers that are experiencing this specific problem.

To resolve this problem, 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, visit the following Microsoft Web site:

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

NOTE: In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual 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
   -------------------------------------------------
   07/11/00  03:45p    170,256  Gdi32.dll   Intel
   07/11/00  03:44p    331,536  User32.dll  Intel
   08/31/00  02:42p  1,276,688  Win32k.sys  Intel
   08/17/00  05:16p    195,856  Winsrv.dll  Intel

STATUS

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

MORE INFORMATION

These issues do not occur in Microsoft Windows 2000.
Modification Type:MinorLast Reviewed:9/26/2005
Keywords:kbHotfixServer kbQFE kbbug kbfix KB262956
©2004 Microsoft Corporation. All rights reserved.