Have you checked the Content Viewer pane of incoming mail options?  Putting a specific rule for reading PowerPoint files by PowerPoint might solve the problem.  Why this should change suddenly I have no idea.  I have no specific rule for PowerPoint presentations and they display fine through the external PowerPoint application.

This may be an easy one for you folks but baffling to me,

I have friends who are sending power point presentations as an attachment with .pps

I used to be able to view but recently cannot. I can can open all other attachments except

the powerpoint. Could I have accidently changed a setting somewhere? What do I need to do?

Thanks for help in advance

[quote user="Eshtaol"]

This may be an easy one for you folks but baffling to me,

I have friends who are sending power point presentations as an attachment with .pps

I used to be able to view but recently cannot. I can can open all other attachments except

the powerpoint. Could I have accidently changed a setting somewhere? What do I need to do?

Thanks for help in advance

[/quote]

You need a an application which can read PowerPoint files: PowerPoint itself (part of MSOffice), PowerPoint Viewer from Microsoft which can read but not create PowerPoint files, or OpenOffice.org's Presentation.  If the file association is corrupted, how to fix it varies with OS, but installing (or reinstalling) PP Viewer (free from MS) should cure the problem.

Thanks for the reply Bob

I was speaking of the opening the powerpoint attachment through my pegasus email which I used to be able to do w/o any problems.                                          

I'm using MS Office 2003 and I can open and read powerpoint applications anywhere else. If I save that PP atachment to my desktop                                      

and then open all is well....it is opening within Pegasus where the problem arises and I used to be able to do this until recently which

leads me to believe I may have  accidently did something to not allow.

Attachments using windows media video/audio , jpg etc are not a problem