Discusses the cause and resolution of error 80040265 in Windows Media Player. This error is caused by an unsupported file format or codec or by corrupted Windows Media Player files.

Codecs allow you to play different formats of audio and video files. Media Player supports a wide variety of codecs. Most are included out of the box; some additional codecs can be installed from the Microsoft Store.

Learn how to get older apps or programs to run on Windows 10 or Windows 11 by adjusting compatibility settings.

If you can’t install, uninstall, or update a desktop program in Windows 10, the Program Install and Uninstall troubleshooter can automatically fix common issues such as corrupted registry keys or incomplete uninstall data.

In Windows, a CD or DVD drive may not appear in File Explorer and may show a yellow exclamation point in Device Manager. This issue usually indicates a driver or configuration problem, and an error code may appear in the device’s Properties under Device status.

Conflicting third-party software: Other third-party software, especially media-related applications, may conflict with Windows Media Player. To resolve this, disable or uninstall third-party media-related software temporarily and see if the issue persists.

Learn how to install the Media Feature Pack for Windows 10/11 N editions (September 2022).

This article explains how to repair apps and programs in Windows 11 and use Settings to fix common app issues without reinstalling. You can repair some apps and programs if they're not running correctly. Note that you won't see repair, change, or modify options for all apps and programs. Repair options from the Settings page.

Play MP4 files in Windows by right-clicking the file and choosing what application to open it with.

Users can make these websites and software work correctly by installing the Media Feature Pack for N and KN editions of Windows 10. Download the update package now. The N and KN editions include the same functionality as Windows 10 editions, except for Windows Media Player and related technologies.