I was recently sent some video clips in .mp4 file format and could not open them with Windows Media Player, which displayed a message saying the file was incomplete or corrupt. I tried various ...

How to change the default program a file opens with in Windows XP When you double-click on a file in Windows XP, the operating system will automatically open the file using a program that has been ...

Check out our guide on how to convert MP4 files to AVI, whether you use Windows or Mac OS X.

When you export a Windows Live Movie to disk its default settings go out to an MP4 file. Windows Media Player on his computer does not play MP4 files.

You can convert files to the MP4 format on the VLC media player, making them more accessible across your devices.