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How to Install and Remove Codecs and MCI Devices in Windows
Article ID: 142731 - View products that this article applies to.
This article was previously published under Q142731
If this article does not describe your hardware-related issue, please see the following Microsoft Web site to view more articles about hardware:
This article describes how to install and remove codecs (compression/decompression) and Media Control Interface (MCI) devices in Windows.
Codecs are used to play compressed files by decompressing them in memory. Adding a specific codec lets you play files compressed in that file format. Removing and reinstalling a codec may solve problems playing a particular file type.
MCI devices are drivers that provide Windows-based programs device- independent capabilities for controlling multimedia hardware and software. Removing and reinstalling MCI devices may solve problems playing certain files.
Adding All Default CodecsTo add all the default codecs in Windows, follow these steps:
Adding a Specific Codec or MCI DeviceTo add a specific codec or MCI device, follow these steps:
Removing the Default CodecsTo remove the default codecs, follow these steps:
Removing a Specific Codec or MCI DeviceTo remove a specific codec or MCI device, follow these steps:
Decompressor Error MessagesIf you are looking for help with a decompressor error message, see one of the following Microsoft Knowledge Base articles:
TITLE : Error Message: Cannot Play Back the Video Stream...
TITLE : Error Message Playing an .avi File with Windows Media Player
TITLE : Err Msg: Unable to Download the Appropriate Decompressor
TITLE : Windows Media Player Invalid File Format Error Message
Windows Media Player Web SiteFor additional information about Windows Media Player, see the following Microsoft Web-site:
Frequently Asked Questions about Windows Media Player
For additional information about the file formats supported by Windows Media Player, click the article number below to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/191346/EN-US/ )File Formats Supported by Windows Media Player