I have made powerpoints with sound.First of all,the sound files must be in wav. format,otherwise they won �t work in any other computer.If your sound files are in other format (like mp3),you should transform them into wav. (you need to use speacial programs to do this.But don �t worry,you can easily find them on net.) Then you can insert them to your powerpoint by simply clicking on the add-add sound files options.I advise you to see your ppt in another computer before uploading it.Hope this helps!:)