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.

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.

Moving Keynote presentations between Mac and Windows can be tricky, especially if you want to open them in PowerPoint. To solve this problem we show you easy ways to edit .key files on a Windows PC ...