The PowerPoint Viewer
The default selection by PowerPoint is Don't include the Viewer.
It is not necessary to include the PowerPoint Viewer if the receiving computer has PowerPoint or the PowerPoint Viewer already installed. The PowerPoint Viewer will also increase the size of the finished package, so do not include it if hard drive space is an issue.
If you are unsure as to whether to include the Viewer or not, it is best to add it to the package, so you do not get an unwelcome surprise later.
