Use this utility to unassociated the file type. Then you can associate the
file type as you wish. I had the same issue.

http://www.winhelponline.com/article...ows-Vista.html

"moscreations" <moscreations.3edh3c@DoNotSpam.com> wrote in message news:moscreations.3edh3c@DoNotSpam.com...
>
> I have tried to correct this problem following the instructions as
> given, I did change the "show" to "open" in the registry and it still
> won't open any pps.
>
> I have Vista and Office 2007, the association is set to open any pps
> with the PowerPoint Viewer.
>
> I made the change in both
> HKEY_CLASSES_ROOT\PowerPointViewer.SlideShow.11 and
> HKEY_CLASSES_ROOT\PowerPointViewer.SlideShow.12
>
> Any other suggestions?
>
> And by the way, the files do open when saved, but won't open when
> trying to open from Windows Mail.
>
> Any help would be appreciated
> Thanks
> Mo
>
>
> --
> moscreations
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