FIX: Memory mapping leaks when a 32-bit process runs on a Windows Server 2003 Service Pack 1 (SP1)-based computer

On a computer that is running Microsoft Windows Server 2003 Service Pack 1 (SP1), a 32-bit process must create a thread as soon as there is a printing operation. If this process runs in a Windows on Windows 64 (WOW64) environment, the 4 megabytes (MB) of memory that maps in the user mode address space leaks during every printing operation. These leaks continue even after a printing thread successfully ends. Therefore, when the process runs out of the user mode address space, you may experience unexpected errors because of the memory allocation failure.

This problem occurs because the 4 MB of memory mapping is created in the user mode address space when a thread calls the CreateDC API for a print device. Then, this is mapped when the thread ends.

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:

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

To apply this hotfix, you must have Windows Server 2003 Service Pack 1 installed on the computer.

Restart requirement

You must restart your 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, x64-based versions with Service Pack 1

Windows Server 2003, Itanium-based versions with Service Pack 1

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.

For more information, click the following article number to view the article in the Microsoft Knowledge Base: