Use AutoRecover : AutoRecover « Editing Format « Microsoft Office PowerPoint 2007 Tutorial






Click the Office button, and then click PowerPoint Options.
Click the Office button, and then click PowerPoint Options.
Click Save. Select the Save AutoRecover information every x minutes check box.
       Enter the number of minutes.
Enter the number of minutes.
2.25.AutoRecover
2.25.1.Use AutoRecoverUse AutoRecover