How to create a Screensaver from PowerPoint

Create a folder on your hard-drive. Now open the PPT or PPS file in Microsoft PowerPoint and click File -> Save As. Select JPEG in from the drop-down option and click Export every slide.

The Powerpoint presentation is now available as JPG images in one folder. Right click the deskop -> Properties -> Screensaver and select the My Picture Slideshow screensaver followed by browse to the folder where you save the PowerPoint file.