If you want a photo slideshow with music, you can always use plain old PowerPoint, but your recipient would need PowerPoint to view it.
You can also go to the Microsoft website and download - free- Photo Story 3 for Windows. (I downloaded mine back in Feb/March, so they might be up to Photo Story 4 by now.) It's pretty simple to use, and I think you can save it in either pdf format or Windows Media player, plus copy to a CD/DVD.
If you've got Photoshop Elements, you can always use the slideshow creator that it has.
They all allow you to add music to your slideshow. Elements has the most bells and whistles, but Photo Story 3 is good for a quick slide show.