Corrupt Powerpoint file, the file extension does not match the I [Solved/Closed]

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Wednesday November 29, 2017
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Wednesday October 8, 2008
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Hello, I have several PowerPoint presentations that I can't open them now it says " file may be corrupted when
use PowerPoint or expansion
file may not match the internal file format " . Please
help, I these presentations have been using them for a long time, I
need help how to recover data?

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19674
Registration date
Wednesday October 8, 2008
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Contributor
Last seen
June 15, 2019
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