You are currently offline, waiting for your internet to reconnect

MS13-057: Description of the security update for Windows Media Format Runtime 9.5 and 11 (wmvdecod.dll) on Windows XP and Windows Server 2003: July 9, 2013

Support for Windows XP has ended

Microsoft ended support for Windows XP on April 8, 2014. This change has affected your software updates and security options. Learn what this means for you and how to stay protected.

Support for Windows Server 2003 ended on July 14, 2015

Microsoft ended support for Windows Server 2003 on July 14, 2015. This change has affected your software updates and security options. Learn what this means for you and how to stay protected.

Microsoft has released security bulletin MS13-057. To view the complete security bulletin, go to one of the following Microsoft websites:

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

More information

Known issues with this security update

August 27, 2013: This update was re-released to resolve the following issue for Windows XP SP3 and Windows Server 2003 SP2.

If you use some of the following software, you might have experienced issues after you installed the initial release version of this security update. In some cases, WMV video files might have failed to successfully encode or decode. Once you apply this re-released security update, this issue is resolved.
  • Adobe Prelude
  • Camtasia Studio
  • Kandoukantan! Photomovie
  • Rome Total War
  • Rome Total War: Barbarian Invasion
  • Serif MoviePlus
  • YouTube Movie Maker
The English (United States) version of this software update installs files that have the attributes that are listed in the following tables. The dates and times for these files are listed in Coordinated Universal Time (UTC). The dates and times for these files on your local computer are displayed in your local time and with your current daylight saving time (DST) bias. Additionally, the dates and times may change when you perform certain operations on the files.

Windows XP and Windows Server 2003 file information

  • The files that apply to a specific milestone (SPn) and service branch (QFE, GDR) are noted in the "SP requirement" and "Service branch" columns.
  • 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 ( that is signed with a Microsoft digital signature.

For all supported x86-based versions of Windows XP

File nameFile versionFile sizeDateTimePlatform

For all supported x64-based versions of Windows Server 2003 and Windows XP Professional x64 edition

File nameFile versionFile sizeDateTimePlatform
update security_patch security_update security bug flaw vulnerability malicious attacker exploit registry unauthenticated buffer overrun overflow specially-formed scope specially-crafted denial of service DoS TSE

Article ID: 2834904 - Last Review: 08/27/2013 17:23:00 - Revision: 7.0

  • Microsoft Windows Server 2003 Service Pack 2
  • Microsoft Windows XP Service Pack 3
  • atdownload kbbug kbexpertiseinter kbfix kbsecbulletin kbsecurity kbsecvulnerability KB2834904