Need to use third-party programs to open files on your PC? Here's how to change file associations in Windows 10 and choose which apps open which file types.

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 ...

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

If you want to convert MP4 to HEVC / H.265 on your Windows PC, use these free MP4 to HEVC converter software and online tools.

How to Open MP4 Files in VirtualDub. VirtualDub is a free digital video application that you can use to make simple edits to footage. The program accepts digital video in the AVI, DIVX, MPG, MPV ...

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.

Microsoft is making it easier to change your default file associations by adding a new search feature that lets you quickly find the extension you wish to modify.