The file came from another computer and might be blocked

I have received a file of type PPT. When I try to change the content it doesn't open with Microsoft PowerPoint, but directly goes to the slide show. When I check the properties of that file, it says "The file came from another computer and might be blocked".

Please let me know how I can edit it with PowerPoint.


Click the button that says "unblock" and it should open fine.

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