I have got Windows Vista on my computer and if I try to open PPS file that is attached to an email message in Windows Mail, then I will get some kind of error that states "*.pps is not a valid Win32 application". I have already installed the Powerpoint Viewer 2007 and when I usually download and save the same file on my computer desktop then it will just open fine. I am also able to open the PPS files just by starting the Powerpoint Viewer 2007 and then browsing my computer for opening it. Since I want to open attachments in Windows Mail, I would like to know who will be able to solve this problem.
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