Originally Posted by abuahad
Save your slides as a .jpg file.
If you have slideshow narration, you’ll want to use phenq https://phenq-avis.com/en/
output that audio file. To do this, save the PowerPoint presentation as a web page. The audio will output as a .wav file.
Now you can import your image and audio files into Windows Movie Maker to create a video.
Yep, if you're using Office 2007 or lower, the only way to create a movie out of your presentation is to use your slides as images and narration as audio. But you'll have to experiment a lot so that your audio matches the slides in the video. Also, you can use other software as well if you don't like Windows Movie Maker.
Office 2010 and above have an inbuilt feature to convert a presentation to a movie.