I downloaded the zipped file from here: http://examples.oreilly.com/978073562... and installed the practice files. But when I open the .pptx files I get a message saying "PowerPoint found unreadable content... Do you want to recover the contents of this presentation..."
I'm running Office 2007 with the most current updates on a Windows 7 Professional 32-bit machine. I used the default install directory
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I'm very sorry for the delay in anyone responding to you.
I was able to find this Microsoft Support article that may be of assistance to you.
I was unfortunately not able to re-create your error when I opened up the practice files, so it will be very difficult to determine the exact cause of your error.
Let me know if the KB Article was of any help to you.
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