This step-by-step article describes how to troubleshoot playback problems with Microsoft Windows Media Player 9. back to the top. Troubleshooting audio and video playback. Most of the time, playback issues in Windows Media Player 9 are caused by one of the following problems: Corrupted media.

AC-3 is an audio codec that supports multi-channel (“surround sound”) audio. It's also known as Dolby Digital. On versions of Windows prior to Windows 11, version 24H2, the AC-3 codec is included. Beginning with Windows 11, version 24H2, the AC-3 codec is no longer included with Windows.

Fixes a playback issue that occurs after you set the ThreadPriority registry key entry to raise the video or audio thread priority on a Windows Embedded Compact 7-based device.

These errors typically occur when there is a problem with audio or video codecs. For example, C00D11B1 is a common codec-related error. To resolve this, see how to fix outdated or corrupted codecs. This error may occur when there's an issue with the playback of media files.

Microsoft supports MPEG4v3 files in .asf streaming format only. These files are not supported in an .avi file type. To play the file, you must encode the file again by using the original source in a supported format, such as the .wmv format. To do this, you can use the Windows Media Encoder.

Fortunately, most sound problems can be fixed by following a series of troubleshooting steps. This article provides a comprehensive guide to resolving audio issues in Windows. The tips are listed in order, so start with the first one, see if that helps, and then continue to the next one if it doesn’t.

By using a separate extension, you can install multiple players on your computer and associate certain players with the .wmv extension for playback of audio and video sources. Windows Media Metafiles (.asx, .wax, .wvx, .wmx, .wpl)

Windows Media Player supports the following file formats: Note MPEG 2 requires third-party software or hardware decoders. Note DVD playback requires third-party software or hardware decoders and is supported only in Windows XP. Note Intel Video File support requires the Intel Video 5.x codec.

To resolve this issue, you must check the functionality of Windows Media DRM and Zune DRM. If Windows Media DRM and Zune DRM do not function, use the ResetDRM tool to reset DRM systems. To do this, follow these steps: Test whether Windows Media DRM and Zune DRM function correctly on your computer. To do this, follow these steps:

Resolves a vulnerability in Windows that could allow remote code execution if a user opens a specially crafted media file. An attacker who successfully exploited this vulnerability could gain the same user rights as the local user.