“*.pps is not a valid Win32 application” error message

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A client could not open *.pps files from an email. They would have to save it to their desktop, then open up the Powerpoint Viewer and navigate to the file.

I found a few sites that provided instructions on how to edit the registry to fix this – they did not seem to help them.

HKEY_CLASSES_ROOT\PowerPointViewer.SlideShow.11\shell\Show
HKEY_CLASSES_ROOT\PowerPointViewer.SlideShow.11\shell\open

http://www.vistax64.com/vista-general/142429-cannot-open-pps-file-e-mail-attachment.html

What did help was this:

Uninstall the existing version of the PowerPoint Viewer.

Then install the first PP View 2007

http://www.microsoft.com/downloads/details.aspx?familyid=048DC840-14E1-467D-8DCA-19D2A8FD7485&displaylang=en

Then, install the latest upgrade – Powerpoint Viewer 2007 Service Pack 1 (SP1)

http://www.microsoft.com/downloads/details.aspx?FamilyID=e985ed98-5003-4dc1-88ec-3e151e4dc790&DisplayLang=en

Then, go into your Control Panel and File Associations and choose *.pps and make sure that you point the file to the PowerPoint Viewer 2007 (SP1) and not the older program.

This seemed to work for them.

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