A family of Microsoft presentation graphics products that offer tools for creating presentations and adding graphic effects like multimedia objects and special effects with text.
Hi Not sure if you resolved this issue, but this might help others who are looking. I have just started using Windows 8 with Office 2007 ppt and had the same issue. I found the solution by starting the slide show, right clicking and opening "Help". This pop-up window shows all the short cut keys. For some reason exiting a slideshow now has 3 different possible commands: ESc, Ctrl+break and the hyphen key "-" (on its own without parenthesis). My slide show exit command was the hyphen. Go figure. What the purpose of changing tried and true commands for different versions of Windows OS is I have no idea, it just makes me cross...
Hope this helps someone.