Problem description: You cannot publish slides to a Slide Library
While trying to publish slides to a Microsoft Office SharePoint Server 2007 Slide Library, you receive the error: This feature requires Microsoft Office PowerPoint Professional.
For a description how to publish slides to a Slide Library, see Publish slides to a Slide Library.
Solution: Install the appropriate Office version.
In contrarery to what the error message could make you believe, it is not enough to install Microsoft Office PowerPoint Professional on your client machine to be able to publish slides.
You should install one of the following Office versions to fix the problem: