Article ID: 969878 - Last Review: October 13, 2009 - Revision: 1.0

MS09-051: Description of the security update for DirectShow WMA Voice Codec: October 13, 2009

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INTRODUCTION

Microsoft has released security bulletin MS09-051. To view the complete security bulletin, visit one of the following Microsoft Web sites:

Home users:
http://www.microsoft.com/security/updates/bulletins/200910.aspx (http://www.microsoft.com/security/updates/bulletins/200910.aspx)
Skip the details: Download the updates for your home computer or laptop from the Microsoft Update Web site now:
http://update.microsoft.com/microsoftupdate/ (http://update.microsoft.com/microsoftupdate/)
IT professionals:
http://www.microsoft.com/technet/security/bulletin/ms09-051.mspx (http://www.microsoft.com/technet/security/bulletin/ms09-051.mspx)

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How to obtain help and support for this security update

For home users, no-charge support is available by calling 1-866-PCSAFETY in the United States and Canada or by contacting your local Microsoft subsidiary. For more information about how to contact your local Microsoft subsidiary for support issues with security updates, visit the Microsoft International Support Web site:

http://support.microsoft.com/common/international.aspx?rdpath=4 (http://support.microsoft.com/common/international.aspx?rdpath=4)

North American customers can also obtain instant access to unlimited no-charge e-mail support or to unlimited individual chat support by visiting the following Microsoft Web site:

http://support.microsoft.com/oas/default.aspx?&prid=7552 (http://support.microsoft.com/oas/default.aspx?&prid=7552)

For enterprise customers, support for security updates is available through your usual support contacts.

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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.

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Windows XP and Windows Server 2003 file information notes

The files that apply to a specific milestone (RTM, SPn) and service branch (QFE, GDR) are noted in the "Service branch” column.
GDR service branches contain only those fixes that are widely released to address widespread, critical issues. QFE service branches contain hotfixes in addition to widely released fixes.
In addition to the files that are listed in these tables, this software update also installs an associated security catalog file (KBnumber.cat) that is signed with a Microsoft digital signature.