You receive a "STOP 0x50" error message that is related to win32k!HmgDecrementShareReferenceCount+0xb on a Microsoft Windows Server 2003-based terminal server.

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This problem occurs if Windows dereferences a freed Graphics Device Interface (GDI) object. For example, this problem occurs if Windows dereferences a device context from the cached device context list of the user.

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Service pack information

To resolve this problem, obtain the latest service pack for Windows Server 2003. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

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Hotfix information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site: Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

Prerequisites

The computer must be running Windows Server 2003 Service Pack 1 (SP1) to install this hotfix.

Restart requirement

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any other hotfixes.

File information

The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.

Windows Server 2003, Itanium-based versions

File name	File version	File size	Date	Time	Platform
Gdi32.dll	5.2.3790.2804	906,240	03-Oct-2006	16:28	IA-64
Win32k.sys	5.2.3790.2804	5,546,496	03-Oct-2006	16:28	IA-64
Wgdi32.dll	5.2.3790.2804	285,184	03-Oct-2006	16:28	x86

Windows Server 2003, x64-based versions

File name	File version	File size	Date	Time	Platform
Gdi32.dll	5.2.3790.2804	610,304	03-Oct-2006	16:28	x64
Win32k.sys	5.2.3790.2804	4,529,664	03-Oct-2006	16:28	x64
Wgdi32.dll	5.2.3790.2804	285,184	03-Oct-2006	16:28	x86

Windows Server 2003, x86-based versions

File name	File version	File size	Date	Time	Platform
Gdi32.dll	5.2.3790.2804	282,112	03-Oct-2006	15:06	x86
Win32k.sys	5.2.3790.2804	1,850,880	03-Oct-2006	13:09	x86

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Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section. This problem was first corrected in Windows Server 2003 Service Pack 2.

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For more information about the description of the standard terminology that is used to describe Microsoft updates, click the following article number to view the article in the Microsoft Knowledge Base:

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