Assume that you uninstall a version of Microsoft PowerPoint 2013 that was installed by using an MSI file on a computer that is running Microsoft PowerPoint 2010. When you try use PowerPoint 2010 to open a file in Protected View, a dialog box notifies you that the file is corrupted and must be repaired. However, if you select to repair the file, you receive the following error message:
There was an error accessing File Name.
To work around this issue, start the Visual Basic for Applications (VBA) editor in PowerPoint 2010. To do this, press Alt+F11 or click the Visual Basic button on the Developer tab. When you start the VBA editor, the following registry keys are added automatically: