Another thing to try is updating to the latest version of WMP.Within WMP, press Alt to show the menu if you can’t see it and choose Help, Check for updates… If this still doesn’t fix the problem you can try installing the K-Lite Codec pack, which includes all the popular video codecs for playing a variety of video formats. There are two fairly common reasons why AVI videos stop playing in Windows Media Player (WMP).First is that AVI files are no longer associated with WMP.The word Codec is a portmanteau of 'compressor-decompressor' ● ffdshow Direct Show Video Codec x86 version 1.3.4533 by Cole. ● Disc Handler - For double click playback on Blu Ray disc icons in Windows Explorer.● ffdshow Direct Show Video Codec x86 version 1.3.4533 by Cole. ● Codec Settings GUI - Allows the user to modify codec, graphics and sound settings.By using Sly Soft Any DVD HD with this Codec Pack, Windows Vista and Windows 7 users can play: Protected Bluray, AVCHD, HD-DVD, DVD, CD. AVI files by default, but a variety of factors from installing other media players to Windows updates can cause them not to play. See also: How to convert videos to different formats First, it’s worth pointing out that you can install the free VLC media player which will play virtually every type of video file on a PC.
● Div X Audio Decoder 4.1 ● mad FLAC Decoder 1.1.0 x86.Just drag and drop your AVI file onto the Windows Media Player title bar (or any area where you don't see a circle with a line through it) and it should open and play.As with older versions of Windows, we recommend installing VLC as this handy free video player will play just about every type of video file and it's always useful to have it installed just in case you come across other file types that Windows Media Player won't open.If you’re not bothered about using Windows Media Player, installing VLC is a good idea because it doesn’t require separate codec packs to be installed: it comes with everything you need to play AVI, MKV, MP4, WMV, MPEG-2 and more, and can also stream video from the web.Update January 2017: In Windows 10, AVI files open with the new Films & TV app.This doesn't support AVI files and you'll see the error below if you try to use it to open one.However, Windows Media Player is still present in Windows 10 and you can search for it in the Start menu.To fix this, open WMP and press Alt to show the menu. In the window that opens, click the File Types tab (note that this doesn’t exist in WMP 12, only in previous versions).Check that Windows video file (.avi) is ticked and, if it isn’t, tick it and click OK.For advanced installation options select "Expert Installation". ● CDXA Reader v1.7.13 x86 - Also known as Form 2 Mode 2 CD or XCD. ● Application Tuning - Changes the default settings for Media Player Classic, NVIDIA 3D Vision Player, and Stereoscopic Player.A codec is a piece of software on either a device or computer capable of encoding and/or decoding video and/or audio data from files, streams and broadcasts. ● CDXA Reader v1.7.13 x64 - Also known as Form 2 Mode 2 CD or XCD. ● Media Player Classic Home Cinema 1.7.13 x86 - Selectable by right clicking on any file.