UMBs for MS-DOS-based applications are no longer available after you install security update 2724197 or hotfix 2732488 on a computer that is running Windows XP SP3 or Windows Server 2003 SP2

Assume that you perform one of the following operations:

• You install the security update that is described in Microsoft Knowledge Base (KB) article�2724197, which is documented in security bulletin MS12-068, on a computer that is running Windows Server 2003 Service Pack 2 (SP2).�
• You install either security update�2724197 or the hotfix that is described in KB 2732488 on a computer that is running Windows XP Service Pack 3 (SP3).

In this situation, the upper memory blocks (UMBs) for MS-DOS-based applications become unavailable.

Notes

• The UMBs are available before you perform the operation.
• You can run the MEM /C�command to display information about the UMBs.

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.

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, submit a request to 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 website: 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 be running Windows XP SP3 or Windows Server 2003 SP2.

For more information about how to obtain a Windows XP service pack, click the following article number to view the article in the Microsoft Knowledge Base: For more information about how to obtain a Windows Server 2003 service pack, click the following article number to view the article in the Microsoft Knowledge Base:

Registry information

To apply this hotfix, you do not have to make any changes to the registry.

Restart requirement

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace a previously released hotfix.

File information

The global version of this hotfix installs files that have the attributes that are listed in the following tables. The dates and the times for these files are listed in Coordinated Universal Time (UTC). The dates and the times for these files on your local computer are displayed in your local time together with your current daylight saving time (DST) bias. Additionally, the dates and the times may change when you perform certain operations on the files.

Windows XP file information notes

• In addition to the files that are listed in these tables, this hotfix also installs an associated security catalog file (KBnumber.cat) that is signed with a Microsoft digital signature.

For all supported x86-based versions of Windows XP

Windows Server 2003 file information notes

For all supported x86-based versions of Windows Server 2003

For all supported x64-based versions of Windows Server 2003

For all supported IA-64-based versions of Windows Server 2003

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

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