The XEX - Xbox 360 Executable File is a video gaming application designed and developed for the Xbox 360 gaming console. This particular file is designed to run specifically on Xbox 360 and is not designed to be opened on a computer. The XEX file updates the Xbox 360 console making it backwards compatible with the original Xbox games. To obtain proper instructions on how to update the Xbox 360 with the default XEX File you can visit Microsoft’s Xbox 360 support page. The original Xbox games had an emulator that allowed users to open those games, but the Xbox 360 has no such emulator at this point.