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.
You may also try the following steps and check if it helps:
Click Start, point to Search, and then click For Files or Folders.
In the Search Results dialog box, type ppt(x)*.tmp under Search for files or folder named, and then click Search Now.
If a file that matches the search criteria is found, right-click the file, and then click Rename. You can give the file any name that you want, but you must give it a ".ppt" or “.pptx” extension.
Double-click the file that you renamed to open it in PowerPoint. If it is the file that you want to recover, click Save As on the File menu, give the file the name that you want for your presentation, select the folder where you want to save it, and then click Save.
NOTE: If you receive an error message when you are attempting to open the file, then the presentation cannot be recovered with this method.