A family of Microsoft presentation graphics products that offer tools for creating presentations and adding graphic effects like multimedia objects and special effects with text.
Here I have managed it out:
https://www.mediafire.com/file/xlbki60c8ackf5t/Themes..zip/file
you can download the themes that were already present and some additional themes in PowerPoint over here
https://www.mediafire.com/file/xlbki60c8ackf5t/Themes..zip/file