A file extensions is a suffix to the filename that's used to indicate what software or program it's associated with. If the required software to read the file is ...

Ever got stuck with a file that has some mysterious extension? Where no matter how much you try, the Jigsaw puzzle doesn’t seem to fit together? So, for instance, if the file has the extension ...

Windows only: When you've got a file with an extension you don't recognize, the free command line tool TrID can help. We've covered how to use the web to find out what kind of file you have, but TrID ...

One of our readers reported that all the file extensions have changed to some unknown file format. If so, it could be a virus! If a virus has changed all the files extensions to unknown applications, ...