Solution 1
This may be a matter of high and low versions, and it is also a comprehensive consideration of the designers.
1. For example, open PowerPoint2010 and click "click Info-manage version-restore unsaved presentations ".
2. The version cannot be found after entering. We can solve the automatic save setting problem. You can try setting the automatic save time to a low point.
3. If you can open the UnsavedFiles folder directly, open it and select the file. Folder path: C:/Users/user name/AppData/Local/Microsoft/Office
4. After restoration, the files that cannot be saved can be displayed.
Solution 2
Since there are still many office2003 users,
Restart the computer and run PowerPoint 2003 again. The prompt is: the PowerPoint encountered a serious error when the add-on "ppt reader add-in" was opened last time. Disable this add-on? To reactivate the add-on, click "About Microsoft Office PowerPoint" in the "help" menu, click "disable project", and click "yes". PowerPoint is finally running, but some people still say they haven't solved the problem. Let's add another solution.
1. "start -- Control Panel", find the corresponding "office version" in the "program and function interface", right-click it, and choose change.
2. On the open interface, select repair and click next.
3. Now I have fixed the office, but the file cannot be found.