I used to work as a photographer and have been asked to talk about this at the village hall. I have chosen all the pics that I want to show alongside the talk, but seem to have no programme on my laptop that will show these as a slideshow. I do all my work in Photoshop which does not have a slideshow facility - at least not one that is simple to create.
Every time I find one to download my OH has apoplexy about it importing a virus - he a glass half full guy!
You could use Powerpoint and create slides by inserting images, or a no brainer is to download Picasa from Google. Organise your images into a folder and play slideshow from that folder. Good Luck I have used both successfully. GJ