<font face="Arial, Verdana">I was helped by someone on IRC with this one. Remove all PowerPoint viewers first. Office PowerPoint apps is OK to keep installed.</font>
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3 options:
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1.) Install PowerPoint Viewer 2003.
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Don't forget to install office2003-kb969615-fullfile-x86-en-us.exe as this is a BIG security fix.</span>
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2.) Install PowerPoint VIewer 2007.
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3.) Install LibreOffice or OpenOffice and use Impress.