It works! Managed to get it working by going through sections of slides and just deleting them, testing it and ctrl-Z to undo then moving on. It ended up being the very second slide, for some reason it was acting up. It was just a black slide with some text on it, nothing fancy, no strange boxes ticked or audio added, just a slide like all the rest. But when I deleted it and made a new one in it's place, it works perfect now. Very strange. Well thank you all very much for your feedback and help. Redmond