Subtitles display spoken audio as text. They are useful for watching foreign movies or for those who are hard of hearing. If you have no use for subtitles, most computer video players have the option to turn them off. If you decide later that you'd like the subtitles back, you can just as easily toggle the option back on. If you truly do not need the subtitles, you can delete the subtitle file.
Open the video file with Windows Media Player. Select "Play" from the menu bar. Open the "Lyrics, Captions and Subtitles" sub-menu and select "Off" to turn off the subtitles.
Open the video file with VLC Media Player. Select "Video" from the menu bar. Open the "Subtitles Track" sub-menu and select "Disabled" to turn off the subtitles.
Open the video file with QuickTime X. Select "View" from the menu bar. Open the "Subtitles" sub-menu and select "Off."
Locate the .SRT file within the folder containing the .AVI file. The .SRT file will have the same name as the .AVI; the .SRT is the subtitles file. Most subtitles for AVI files are contained within an .SRT. Move the .SRT file to the trash or Recycle Bin if you wish to permanently delete the video's subtitles.