If PowerPoint says that it can't open or read this type of presentation file, then use these proven fixes to resolve the issue once and for all.

How to Open a PPT File Without Powerpoint. Microsoft PowerPoint is on over a billion computers worldwide, according to Robert Gaskins, one of the program's developers.

Curse you and your ever-changing file formats, Microsoft! Here's how to import 20th-century presentations into PowerPoint 2007.