“*.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.



What did help was this:

Uninstall the existing version of the PowerPoint Viewer.

Then install the first PP View 2007


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


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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