Windows users can also start a PowerPoint slide show using Windows Explorer. This is the quickest way to start a Slideshow without launching PowerPoint then selecting the Slide Show view. To start PowerPoint Slideshow using explorer, navigate to the stored location of the PowerPoint Presentation file. Then right click on the file, from the context menu select Show from the list of available menus.
This would start the PowerPoint Slideshow and if you want to exit the Slideshow then press Esc on your keyboard. This is an useful tip if you are looking only for Slideshow and not making modification to the presentation file.