To recover a PowerPoint file that had not been saved, use the PowerPoint AutoRecover system. PowerPoint also generates temporary copies of your file after a certain time, and this backup is saved in a special folder on the computer. You can use PowerPoint, which can be reopened or navigate to the Recover Unsaved Presentations section, where you can find these .pptx backups. The temporary file can always be opened, and you can save it correctly as long as it exists, and you will not lose all the progress.