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Important This article contains information about modifying the registry. Before you modify the registry, make sure to back it up and make sure that you understand how to restore the registry if a problem occurs. For information about how to back up, restore, and edit the registry, click the following article number to view the article in the Microsoft Knowledge Base:
256986 Description of the Microsoft Windows Registry
When you click Open on the File menu, and then look through your presentations in the File Open dialog box, the preview image in the Preview pane appears fuzzy or jagged.
Because of changes in how the preview image is saved in Microsoft Office PowerPoint 2007, in Microsoft Office PowerPoint 2003, and in Microsoft PowerPoint 2002, the preview image File Open dialog box is more difficult to read than in PowerPoint 2000 and earlier versions.
Warning Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method. These problems might require that you reinstall the operating system. Microsoft cannot guarantee that these problems can be solved. Modify the registry at your own risk. To work around this behavior, follow the steps for your version of PowerPoint.
Click Start, click Run, type regedit, and then click OK.
Locate and then click the following key in the registry: