How do you put a song on power point presentation for the whole presentation?

1. At slide 1, click insert -> sound -> sound from file. Select the music you want to insert;

2. In the succeeding dialog box which say "How do you want the sound to start in the slide show", please select?.

3. Click on the sound icon on the slide. The ribbon should change to the contextual menu (http://en.wikipedia.org/wiki/Context_menu) for sound. If the ribbon does not change, click on the Sound Tools link above the ribbon. Select "Loop Until Stopped" at the "Sound Option" above the slide, at the same time, in the "Play Sound" item, select "play across slide".

After you have done the three steps above, the music you desired can be played all over the slides.