As my version of MS Office doesn't include Powerpoint, I've recently installed Open Office. Its 'Impress' presentation module seems to be able to open Powerpoint files with no problem, and to create Powerpoint-compatible presentations.
I have set Impress as the default viewer for Powerpoint files, but when I double-click on a Powerpoint file it doesn't automatically open as a slideshow. It opens in the Impress edit window, and I have launch the slideshow function.
Is there any way of making Powerpoint files launch automatically as slideshows?