If you use the Vista slide show screensaver and get the following error:An error is preventing the slide show from playing
It may be the database file is corrupt, in which case navigate to:C:Users<Your Username>AppDataLocalMicrosoftWindows Photo GalleryPictures.pd4
and delete ‘Pictures.pd4’. It may also help to remove any video files from the target directory, although the screensaver will play certain video formats.
If your still getting the error after following these steps try reducing the number of images in the target directory – this is a last resort.