Describes the security update for Office 2010 (MSO) that was released on August 14, 2012.

INTRODUCTION

Microsoft has released security bulletin MS12-057. To view the complete security bulletin, go to one of the following Microsoft websites:

Home users:
http://www.microsoft.com/security/pc-security/bulletins/201208.aspx
Skip the details: Download the updates for your home computer or laptop from the Microsoft Update website now:
http://update.microsoft.com/microsoftupdate/
IT professionals:
http://technet.microsoft.com/security/bulletin/MS12-057

How to obtain help and support for this security update

Help installing updates: Support for Microsoft Update

Security solutions for IT professionals:
TechNet Security Troubleshooting and Support

Help protect your Windows-based computer from viruses and malware: Virus Solution and Security Center

Local support according to your country:
International Support

Known issues with this security update

Microsoft Update or Windows Update may offer this update even though you do not have Microsoft Office 2010 installed. For more information about this issue, click the following article number to view the article in the Microsoft Knowledge Base:
830335 Microsoft Update and Windows Update offer updates for Office programs that you do not have installed
After you install this security update, Office files that have RMS protection seem to crash. For more information about how to resolve this issue, click the following article number to view the article in the Microsoft Knowledge Base:
2750155 Office files that have RMS protection seem to crash

Prerequisites to apply this security update

To install this security update, you must have Microsoft Office 2010 Service Pack 1 (SP1) installed on the computer.

For more information about how to obtain this service pack, click the following article number to view the article in the Microsoft Knowledge Base:

2460049 Description of Office 2010 SP1

Restart information

You may have to restart the computer after you install this security update.

In some cases, this update does not require a restart. If the required files are being used, this update will require a restart. If this behavior occurs, a message is displayed that advises you to restart the computer.

To help reduce the possibility that a restart will be required, stop all affected services and close all applications that may use the affected files before you install this security update. For more information about the reasons why you may be prompted to restart, click the following article number to view the article in the Microsoft Knowledge Base:

887012 Why you may be prompted to restart your computer after you install a security update on a Windows-based computer

Security update replacement information

This security update replaces the following security update:

2584066 MS11-073: Description of the security update for Office 2010: September 13, 2011

Removal information

To remove this security update, use the Add or Remove Programs item or the Programs and Features item in Control Panel.

Note When you remove this security update, you may be prompted to insert the disc that contains Office 2010. Additionally, you may not have the option to uninstall this security update from the Add or Remove Programs item or the Programs and Features item in Control Panel. There are several possible causes of this issue.

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

903771 Information about the ability to uninstall Office updates

File information

The English (United States) version of this security update 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.

For all supported x86 versions of Office 2010

File name	File version	File size	Date	Time
Mso.dll	14.0.6129.5000	18,628,704	21-Oct-2012	4:59

For all supported x64 versions of Office 2010

File name	File version	File size	Date	Time	Processor
Mso.dll	14.0.6129.5000	24,277,616	21-Oct-2012	04:56	x64
Mso.dll	14.0.6129.5000	18,628,704	21-Oct-2012	04:59	x86

MS12-057: Description of the security update for Office 2010 (MSO): August 14, 2012