After upgrading your Windows Vista computer to Windows 7, when you right-click on a JPG/JPEG image and click Edit, the following error message may appear:
There was a problem starting C:\Program Files\Windows Photo Gallery\PhotoViewer.dll
The specified module could not be found.




When you open the Windows Live Photo Gallery Screensaver settings dialog, theme controls may be missing and the message "This computer’s video card can’t play themes" is displayed. You might be knowing that the themes in Windows Photo Gallery slideshow as well as in Windows Live Photo Gallery screensaver won’t be enabled if the Graphics card score (Windows Experience Index) is less than 3.0. 