This list contains all of the known Microsoft Knowledge Base articles, howtos, fixes, hotfixes, webcasts and updates of Microsoft Windows Media Player 9 that have been released. The list is daily updated.
- 973540 MS09-037: Description of the security update for Windows Media Player: August 11, 2009 Q973540 KB973540 January 25, 2021
- 936782 MS07-047: Vulnerability in Windows Media Player could allow remote code execution Q936782 KB936782 January 25, 2021
- 843509 Resources for troubleshooting issues in Windows Media Player Q843509 KB843509 August 20, 2020
- 316992 File types supported by Windows Media Player Q316992 KB316992 December 17, 2019
- 941197 After you apply security update 936782, you cannot open.swf files in Windows Media Player Q941197 KB941197 November 6, 2019
- 814129 FIX: Error in Windows Media Player 9 Series When You Play Specific MP3 Files Q814129 KB814129 April 23, 2018
- 816044 FIX: Hardware-Created ASF Files Stop Playing in Media Player 9 Series Q816044 KB816044 April 22, 2018
- 326725 Problems with Windows Media Player Full-Screen Visualizations on Your Secondary Monitor Q326725 KB326725 April 20, 2018
- 265473 How to Back Up and Restore Media Player License Files Q265473 KB265473 April 20, 2018
- 811982 How to troubleshoot playback in Windows Media Player 9 Q811982 KB811982 April 19, 2018
- 260023 How to Configure Proxy Settings in Media Player Q260023 KB260023 April 19, 2018
- 245608 File Formats Supported by Windows Media Player Versions 6.0 and Later Q245608 KB245608 April 19, 2018
- 940893 How can I disable changes in Windows Media Player that are introduced after I install security update 936782? Q940893 KB940893 April 17, 2018
- 891664 You may be unable to play protected content after your computer hardware changes Q891664 KB891664 April 17, 2018
- 883831 A client may not be able to connect to multicast streams or to other User Datagram Protocol streams through Windows Firewall by using Windows Media Player Q883831 KB883831 April 17, 2018
- 279242 You receive an error message when you try to play an .avi file in Windows Media Player Q279242 KB279242 April 17, 2018
- 278960 How can I enable or disable automatic updates in Windows Media Player? Q278960 KB278960 April 17, 2018
- 243621 How to delete the recent play list from Windows Media Player Q243621 KB243621 April 17, 2018
- 234019 Windows Media Player Invalid File Format Error Message Q234019 KB234019 April 17, 2018
- 268260 How to Export a Playlist in Windows Media Player Q268260 KB268260 April 16, 2018
- 2395168 Basics about videos and video codecs in Windows Media Player Q2395168 KB2395168 December 11, 2017
- 190990 How to determine the version of Windows Media Player Q190990 KB190990 October 27, 2017
- 842180 "Cannot play back the file. The format is not supported. (Error=80040265)" error message when you try to play a media file in Windows Media Player Q842180 KB842180 May 10, 2017
- 891122 An update for Windows Media Digital Rights Management-enabled players is available Q891122 KB891122 March 30, 2017
- 899113 The default codecs that are included with Windows Media Player 9 and with Windows Media Player 10 Q899113 KB899113 March 29, 2017
- 892313 FIX: Updates for Windows Media Player 9 Series and for Windows Media Player 10 Q892313 KB892313 March 29, 2017
- 828026 Update for Windows Media Player URL script command behavior Q828026 KB828026 March 29, 2017
- 909554 The screen may appear black or green during playback when the Windows Media Player control is embedded in a Web page Q909554 KB909554 February 15, 2017
- 927389 The backup program may fail or may incorrectly include DRM protected files in your backup Q927389 KB927389 December 9, 2015
- 889136 FIX: "0x8004020D - The buffer is not big enough" error message when you play back or to convert a WAV file that is larger than 2 gigabytes in your client application that uses Microsoft DirectX Q889136 KB889136 January 17, 2015
- 839303 FIX: An incorrect time code is displayed in Windows Media Player 9 Series Q839303 KB839303 January 17, 2015
- 962916 Installing update triggers virus protection alert Q962916 KB962916 January 16, 2015
- 954069 Windows Media Encoder 9 crashes when you switch the input and output viewers and change resources repeatedly Q954069 KB954069 January 16, 2015
- 941828 Some codecs are not listed in the encoder when you try to encode a video in Windows Media Encoder 9 Series Q941828 KB941828 January 16, 2015
- 934113 Streaming content stops, and you may receive an error message when you click "Next" in Windows Media Player Q934113 KB934113 January 16, 2015
- 923978 The mediaName attribute may not be obtained when you stream content by using the Windows Media Player SDK Q923978 KB923978 January 16, 2015
- 917734 MS06-024: Vulnerability in Windows Media Player could allow remote code execution Q917734 KB917734 January 16, 2015
- 910388 Windows Media Player streams content through the proxy for addresses that you add to the “Do not use proxy server for addresses beginning with” text box Q910388 KB910388 January 16, 2015
- 904550 You may receive a "Windows Media Player cannot play the file" error message when you try to restart a video in Windows Media Player in a multiple-monitor configuration Q904550 KB904550 January 16, 2015
- 895181 FIX: You may experience a color smearing or bleeding effect when you play MPEG4 videos in Windows Media Player 9 or 10 Q895181 KB895181 January 16, 2015
- 892763 FIX: Windows Media Player 9 Series may ignore a fractional STARTTIME value and a fractional DURATION value for a non-English locale Q892763 KB892763 January 16, 2015
- 891772 BUG: Windows Media Player only plays the first item in the playlist when you embed an ActiveX control in a Web page and you set the Autostart parameter to false Q891772 KB891772 January 16, 2015
- 891663 BUG: Windows Media Player on a hyperthreaded computer stops responding when you transfer DRM files to a portable music player device Q891663 KB891663 January 16, 2015
- 888407 FIX: Starting Windows Media Player with a skin parameter changes the default skin preference Q888407 KB888407 January 16, 2015
- 887163 You may receive an error message when you change the screen orientation while video is playing in the Windows Media Player 9 Series Q887163 KB887163 January 16, 2015
- 887078 FIX: Windows Media Player may return an NS_E_INVALID_DATA error when playing Fast Cached content Q887078 KB887078 January 16, 2015
- 886610 FIX: Windows Media Player does not restore backed up licenses Q886610 KB886610 January 16, 2015
- 884487 A chapter does not play when you click it in some WMV HD DVD disks in Windows Media Player Q884487 KB884487 January 13, 2015
- 883616 BUG: Some DRM rights do not appear correctly on the License tab in Windows Media Player Q883616 KB883616 January 12, 2015
- 872899 FIX: MPEG4 content may be blocky when you use the Windows Media Player Q872899 KB872899 January 12, 2015
- 870651 FIX: Windows Media Player 9 Series randomly selects a record from the list of DNS entries Q870651 KB870651 January 12, 2015
- 840718 DVD movies play full-screen in a single color on Windows XP Q840718 KB840718 January 12, 2015
- 840648 FIX: Windows Media Player 9 Series quits unexpectedly while you are playing online content Q840648 KB840648 January 12, 2015
- 840595 FIX: Windows Media Player 9 Series uses a proxy server although Group Policy is set to use None Q840595 KB840595 January 12, 2015
- 840259 FIX: The metadata of Windows Media content is hidden from the shell when you switch locales Q840259 KB840259 January 12, 2015
- 840227 FIX: You receive an error in Windows Media Player 9 Series when you stream certain files by means of Real Time Streaming Protocol Q840227 KB840227 January 12, 2015
- 837170 You cannot expand a playlist for content on a Web server Q837170 KB837170 January 12, 2015
- 838101 You receive error 0xC00D10B3 when you try to play online content Q838101 KB838101 January 11, 2015
- 814127 FIX: Windows Media Player 9 Series Does Not Play G.711 Content Q814127 KB814127 January 11, 2015
- 259914 How to Change Connection Speed Information in Windows Media Player Q259914 KB259914 January 11, 2015
- 838096 Windows Media Player may not connect while using proxy auto-configuration (PAC) scripts Q838096 KB838096 January 10, 2015
- 813405 Windows Media Player 9 Codec May Not Play Back Video Stream with Broadcast Quality in an Auto-Start Broadcast Publishing Point Q813405 KB813405 January 10, 2015
- 830234 DVD closed captions do not work after you use Suspend mode or Hibernate mode Q830234 KB830234 January 6, 2015
- 819835 PRB: Swirl Visualization May Stop Moving in Full Mode Q819835 KB819835 January 5, 2015
- 837272 The time to copy increases as the number of items in the Media Library increases for Windows Media Player 9 Series Q837272 KB837272 December 31, 2014
- 836544 FIX: You cannot seek some MPEG4 content in Windows Media Player 9 Series Q836544 KB836544 December 28, 2014
- 832732 FIX: A constant rate of many script commands may cause Windows Media Player to use maximum CPU Q832732 KB832732 December 28, 2014
- 822964 FIX: Windows Media Player 9 Series Downloads Radio Preset Information Q822964 KB822964 December 26, 2014
- 831158 How to Remove the Roxio CD Burning Plug-In from Windows Media Player 9 on a Computer That Is Running Windows 2000 Q831158 KB831158 February 27, 2014
- 828774 PRB: You Receive Errors While Burning a CD by Using Windows Media Player 9 Series on Windows 2000 Q828774 KB828774 February 27, 2014
- 828604 FIX: The Norwegian version of Windows Media Player 9 Series for Windows Millennium Edition crashes Q828604 KB828604 February 27, 2014
- 827560 FIX: Small delay when Windows Media Player 9 Series switches files that are streamed from a Windows Media Services 9 Series server Q827560 KB827560 February 27, 2014
- 823319 Problems With Simultaneous Analog Playback and Record Q823319 KB823319 February 27, 2014
- 822926 FIX: The First User Experience Dialog Box Is in English Q822926 KB822926 February 27, 2014
- 821990 You Cannot Turn Off Error Reporting in Windows Media Player 9 Series for Windows 2000 Q821990 KB821990 February 27, 2014
- 821368 FIX: Screen Saver Takes a Long Time to Engage When Windows Media Player 9 Series is in Full Screen Q821368 KB821368 February 27, 2014
- 820771 FIX: Windows Media Player 9 Series Seek Bar Has Zero Length on Certain DVDs Q820771 KB820771 February 27, 2014
- 816089 FIX: Windows Media Player 9 Series Prompts User for Credentials with NTLM Authenticated Proxy Q816089 KB816089 February 27, 2014
- 814190 How to control content caching in the Windows Media 9 Series platform Q814190 KB814190 February 27, 2014
- 813398 Default Peak Video Bitrate Encodes As CBR 2 Pass Instead of VBR 2 Pass in WMCmd.vbs Script Q813398 KB813398 February 27, 2014
- 813390 Windows Media Player Tries to Download a Codec it Does Not Need Q813390 KB813390 February 27, 2014
- 811995 HOW TO: Add Programs to the Windows Media Player 9 Series Compatibility Layer Bypass List Q811995 KB811995 February 27, 2014
- 816983 Media Player 9: Find Album Info causes script error Q816983 KB816983 November 3, 2013
- 814629 Windows Media Player stops responding or generates an error message while playing an AVI file when you switch between a windowed and full-screen command prompt Q814629 KB814629 October 26, 2013
- 813397 Clear History Command Does Not Delete History from the Open Dialog Box Q813397 KB813397 October 26, 2013
- 811254 How To Remove Windows Media Player 9 Beta Q811254 KB811254 October 26, 2013
- 916257 After you install the update that is described in Knowledge Base article 828026 on a Windows XP-based computer, Windows Update detects and installs the update every time that you visit the Windows Update Web site Q916257 KB916257 April 22, 2013
- 2799456 Windows Media Player prompts using SSL when checkbox to save password is checked Q2799456 KB2799456 January 18, 2013
- 832353 FIX: Some URL script commands do not work after you apply the Windows Media update from Knowledge Base article 828026 Q832353 KB832353 October 9, 2011
- 2627345 Windows Media Player error with Double Byte Character filenames Q2627345 KB2627345 October 6, 2011
- 911565 MS06-005: Vulnerability in Windows Media Player could allow remote code execution Q911565 KB911565 September 30, 2011
- 942423 FIX: You cannot play Windows Media content that is encoded by using the VC1 codec in Windows XP, in Windows Server 2003, or in Windows 2000 Q942423 KB942423 September 27, 2011
- 927139 You experience encoding problems when you use Windows Media Encoder x64 Edition 9 Series and Windows Media Player 9 Series on the same computer Q927139 KB927139 September 27, 2011
- 891738 Content does not play correctly when you try to play content that you do not have an installed codec for in Windows Media Player 10 Q891738 KB891738 September 27, 2011
- 891736 Windows Media Player 6.4 is embedded in Web pages even when Windows Media Player 9 Series or Windows Media Player 10 is installed Q891736 KB891736 September 27, 2011
- 886423 FIX: Windows Media Player 9 Series for Windows frequently accesses the registry and may affect performance Q886423 KB886423 September 27, 2011
- 885353 FIX: Windows Media Player 9 Series for Windows may prompt you for your credentials when submitting the client log Q885353 KB885353 September 27, 2011
- 884267 FIX: The audio is temporarily lost for some items in the playlist when you play streaming content by using the RTSP protocol Q884267 KB884267 September 27, 2011
- 842185 You receive an "No combination of filters could be found to render the stream" error message in Windows Media Player Q842185 KB842185 September 27, 2011
- 842182 You receive a "Cannot play back the video stream" error message in Windows Media Player Q842182 KB842182 September 27, 2011
- 888020 You receive an "Error number 0x80004005" error message when you try to copy an audio CD or add a playlist to Windows Media Player Q888020 KB888020 September 23, 2011
- 813399 Encoder Settings Are Lost When You Export Profile Q813399 KB813399 September 23, 2011
- 813344 Encoder server page stops responding when the server loses its connection Q813344 KB813344 September 23, 2011
- 2519435 Information about the Multimedia file types that Windows Media Player supports Q2519435 KB2519435 April 7, 2011
- 234292 Error message when you type the name of a file to play by using Windows Media Player: "Cannot open file" Q234292 KB234292 December 12, 2007
- 842186 You receive an "Unable to download appropriate decompressor" error message in Windows Media Player Q842186 KB842186 December 5, 2007
- 320454 Microsoft Baseline Security Analyzer (MBSA) version 1.2.1 is available Q320454 KB320454 December 3, 2007
- 938920 Certain kinds of video content do not play after you apply a windowless skin such as the Revert skin to Windows Media Player Q938920 KB938920 November 26, 2007
- 819639 MS03-021: A Flaw in Windows Media Player May Permit the Media Library to Be Accessed Q819639 KB819639 November 7, 2007
- 811981 Description and Availability of Windows Media Player 9 Series Q811981 KB811981 October 26, 2007
- 810422 "Licenses for your media files are corrupted" or "License is either corrupted or not valid" error message when you try to play licensed media files Q810422 KB810422 August 21, 2007
- 834694 The narration does not play when you view a PowerPoint presentation from a Web page Q834694 KB834694 July 27, 2007
- 320944 How to Turn Off the Processing of HTML Scripts That Are Contained in Windows Media Files Q320944 KB320944 June 6, 2007
- 813345 Windows Media Player 9: Wmfdist.exe Is Replaced When Windows XP Is Installed or Reinstalled Q813345 KB813345 June 5, 2007
- 839340 FIX: Update to behaviors of certain proxy servers on Windows Media Player 9 Series Q839340 KB839340 May 18, 2007
- 811166 Windows Media Player Does Not Play Windows Media Video 9 Content Correctly Q811166 KB811166 May 7, 2007
- 272116 Windows Media Player Library Contains Invalid Entries Q272116 KB272116 May 7, 2007
- 819881 Support WebCast: Microsoft Windows Media Player 9 Series: An Overview Q819881 KB819881 April 29, 2007
- 813403 Windows Media Player Tries to Open HTTP://1/ After You Open a Web Page that Requires a License Q813403 KB813403 February 1, 2007
- 813402 Windows Media Player May Skip a "No Skip" Item in a .asx Playlist During Playback Q813402 KB813402 February 1, 2007
- 813401 Windows Media Player Skips Live Station After It Plays a .wsx File in an .asx Playlist Q813401 KB813401 February 1, 2007
- 813394 WMP9: Find Album Info Command Does Not Work Q813394 KB813394 February 1, 2007
- 813392 "Windows Media Player Caused an Error in Kernel32.dll" Error Message When You Start Microsoft Windows Media Player 9 Q813392 KB813392 February 1, 2007
- 813389 Web Page Banners Do Not Appear in the Windows Media Player Control Q813389 KB813389 February 1, 2007
- 813388 WMP9: ActiveX Player Downloads SAMI File Together with Media Stream Q813388 KB813388 February 1, 2007
- 813343 Windows Media Player 9 Quits Responding Using Windows Media Netscape Plug-In Q813343 KB813343 February 1, 2007
- 329865 Device Compatibility Issues with Windows Media 9 Series Q329865 KB329865 February 1, 2007
- 317101 Error Message: Windows Media Player Error C00D10B3 - Unable to Access the Network Q317101 KB317101 January 31, 2007
- 315959 Additional query strings for Windows Media Player Q315959 KB315959 January 31, 2007
- 314612 Windows XP Cannot Enter Standby Mode When Window Media Player Is Paused Q314612 KB314612 January 31, 2007
- 307911 Windows Media Player Cannot Play CD-ROM with Both Audio and Data Tracks Q307911 KB307911 January 31, 2007
- 303271 Windows Media Player Does Not Transcode DRM Files to Your Portable Device Q303271 KB303271 January 31, 2007
- 298083 Visualizations Are Distorted or Missing in Full Screen Mode Q298083 KB298083 January 31, 2007
- 284971 Unable to Locate Either CD Deluxe or CD Player Playlists in Windows Media Player Q284971 KB284971 January 29, 2007
- 284852 Player Unable to Download Codecs Through Authenticated Proxy Q284852 KB284852 January 29, 2007
- 278947 Error Message "Unable to Download an Appropriate Decompressor." Playing an .avi File Q278947 KB278947 January 29, 2007
- 271647 A description of the Digital Audio Extraction feature in Windows Media Player Q271647 KB271647 January 29, 2007
- 266035 Digital CD-ROM Playback Continues After Setting Windows Media Player to Analog CD Playback Q266035 KB266035 January 27, 2007
- 265494 Error Message: Windows Media Player Is Not Configured for the Internet Q265494 KB265494 January 27, 2007
- 265333 Windows Media Player 7 and Later Report Duration Differently from Version 6.4 Q265333 KB265333 January 27, 2007
- 264202 Intermittent Clicks and Pops When You Play a CD in Windows Media Player Q264202 KB264202 January 27, 2007
- 257210 Windows Media Player Does Not Support the .VIV File Format Q257210 KB257210 January 27, 2007
- 247355 Description of Windows Media Audio/Video Playlist Files Q247355 KB247355 January 25, 2007
- 235901 Media Player Cannot Establish a Connection to the Server Q235901 KB235901 January 24, 2007
- 234904 Error C00D0029 Using Windows Media Player Q234904 KB234904 January 24, 2007
- 232987 Err Msg: Could Not Connect to a Multicast Channel (Error=C00D07F2) Q232987 KB232987 January 24, 2007
- 230687 Error Message: Unable to Download an Appropriate Decompressor Q230687 KB230687 January 24, 2007
- 221831 Err Msg: Unable to Download the Appropriate Decompressor Q221831 KB221831 January 24, 2007
- 819105 Information about relative URL paths may no longer work Q819105 KB819105 January 12, 2007
- 817855 FIX: Java Runtime Does Not Initialize the Windows Media Player 9 OCX Control in Netscape Navigator Q817855 KB817855 December 30, 2006
- 890261 MS05-009: Vulnerability in PNG processing could lead to buffer overrun Q890261 KB890261 November 17, 2006
- 839221 User Datagram Protocol does not work with some firewall packet inspection routines Q839221 KB839221 November 17, 2006
- 836436 Playlist on a Web page only plays the first sound file Q836436 KB836436 November 17, 2006
- 836073 Network traffic increases when folders are monitored after you upgrade to Windows Media Player 9 Series or a later version of Windows Media Player Q836073 KB836073 November 17, 2006
- 834483 You receive error 0xC00D1197 when you play an audio CD in Windows Media Player 9 Series Q834483 KB834483 November 17, 2006
- 833193 A DVD does not play on a secondary monitor when the battery is low on a laptop Q833193 KB833193 November 17, 2006
- 830414 FIX: Windows Media Player 9 Series May Not Be Able to Connect Through an Authenticated Proxy 2.0 Proxy Server Q830414 KB830414 November 17, 2006
- 830114 Windows Media Player 9 Series Performance Is Poor for Every Second Item in the Playlist Q830114 KB830114 November 17, 2006
- 827034 BUG: The "Copy To" Folder for Users Who Have Administrative Credentials Points to the Administrator Home Directory on SysPrep Images Q827034 KB827034 November 17, 2006
- 825695 Microsoft Media Player 9 Series for Windows XP Records a Two-Second Gap Between Tracks When It Records an Audio CD Q825695 KB825695 November 17, 2006
- 824397 PRB: Full-Screen Mode Does Not Work When Multiple Monitors Have Different Resolution Settings Q824397 KB824397 November 17, 2006
- 823275 FIX: Custom File Extensions Are Categorized as Other Media Q823275 KB823275 November 17, 2006
- 822620 FIX: Play Button Is Enabled Too Early in the German Version of Windows Media Player 9 Q822620 KB822620 November 17, 2006
- 821030 FIX: Updated OEM Packages for Spanish, Italian, and Hungarian Versions of Windows Media Player 9 Q821030 KB821030 November 17, 2006
- 820772 FIX: Windows Media Player 9 Series Video May Freeze in a Multiple Monitor Scenario Q820772 KB820772 November 17, 2006
- 820218 BUG: The Left Mouse Button Stops Responding After You Cancel the Welcome Screen Q820218 KB820218 November 17, 2006
- 320280 Windows Media Player May Not Play Audio Files from Web Server If Third-Party Players Are Installed Q320280 KB320280 November 17, 2006
- 914794 Error message when you play back AVI files that use the Intel Indeo video codec after you upgrade to Windows XP SP2: "Windows Media Player could not play the file" Q914794 KB914794 March 14, 2006
- 885492 Microsoft has released a security update to Microsoft Windows Media Player 9 Q885492 KB885492 September 9, 2005
- 886273 Error code information for Windows Media Player 9 Series Q886273 KB886273 September 8, 2005