It's 2012 and I have the same problem.
The December 2008 reply by John@parallels is bogus because he's missing the point. He said:"Right click on ppt, pptx files select Open With and select Power Point and check, always open such kind files with this program. If you cannot see Power Point in list navigate to installation folder to c:\Program File \Microsoft Office - or to folder you selected to install"
As the user back in 2008 was trying to say (and I'm saying it now because I have the same problem) is that even if you navigate to the executable file and choose it, it immediately FORGETS that you chose it!
Let me be even clearer: Powerpoint is not in the list, so I click "Browse." I browse to the executable and select it (POWERPNT). Then I click "Open" (my only other choice is "Cancel"). That brings me back to the "Choose the program you want to use to open this file" screen.
In that screen, Powerpoint STILL isn't there, and Keynote is selected! As in, between clicking "Open" and getting back to this screen, it completely FORGOT that I had chosen it.
My setup: OS X Lion, with Parallels 7.
Windows 7 64 bit. Office 2010 home and school edition.
Keep this in mind: Up until today I was using Office 2007 Pro, and it worked perfectly. It knew that a .pptx was a Powerpoint. It's only since I removed Office 2007 and installed Office 2010 that the problem started.
Any help would be appreciated.
Small update: I'm not sure how, but I managed to get Powerpoint to show up in the list (it might be because I put a shortcut to the executable in the "Program Files" folder -- the source file is in "Program File (x86)". It doesn't even say "Powerpoint." It says "Microsoft Office 2010 component" and uses the Powerpoint icon.
Once I set that, I double-click a .pptx file and I get "<file name> is not a valid Win32 application."
Grrrrrr! What's going on?
Last edited: Jun 22, 2012