Currently Being ModeratedApr 19, 2013 12:25 AM (in response to The Spirit of an spreading intelligence filled up with burning blood)
PowerPoint is unable to open Keynote files. To show a presentation created by Keynote on a Windows system,
export a Powerpoint file:
Share > Export > PowerPoint
Audio and video contained in a Keynote file can be exported as; Keynote, PowerPoint or Quicktime files.