First, open up control panel and click Appearance and Presentation. Then follow as the image below. Click 'Folder Options'. Then click the 'View' tab at the top. Now, scroll down just a little bit to were it says 'Hide Extensions for known file types' and uncheck that box next to it and click the 'OK' button at the bottom.
Now that the setting has been fixed, you can go to your file, right click it and go to 'rename'. There you can rename your file and add any file type extension to the end.
NOTE: Many file types can become damaged if not renamed correctly or to an off format. If converting audio files or picture files you may want to search for an open source converter program.
Now that the setting has been fixed, you can go to your file, right click it and go to 'rename'. There you can rename your file and add any file type extension to the end.
NOTE: Many file types can become damaged if not renamed correctly or to an off format. If converting audio files or picture files you may want to search for an open source converter program.
