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Please try to open powerpoint, go to File Click Recent and In the bottom (right-center), please look for Recover Unsaved Presentations Click on that link, then you will be presented with all documents that were auto saved but not saved manually by you.
Let me know the results
I'm sorry for delay in replying, what is the version of your power point please?
Please Try to open the presentation in PowerPoint Viewer :
First Go to the PowerPoint Viewer download webpage
Install PowerPoint Viewer :
Open the damaged presentation in PowerPoint Viewer :
Please try another solution :
Download LibreOffice at the link below and see if it will open it, Open LibreOffice first, then select your file to open
If you have a chance to open the file, Save it with different name.
If the problem persists please reply back to me
Solution A : Insert the Slides into a Blank Presentation
Solution B :
Paste the slides from the damaged presentation into a new presentationUse a copy and paste operation to move the slides from the damaged presentation to a blank presentation. To do this, follow these steps:
Solution C : Save the presentation as RTF (Rich Text Format)If the corruption is throughout the presentation, saving as RTFmay be the only option to recover any data. This method, if successful,recovers only the text that appears in Outline view. To do this, followthese steps:
Solution D :
Try opening the presentation with Google slides : https://www.google.com/slides/about/
Try opening the presentation on another computer.
Hope it work out