If you upgraded from Windows Vista to Windows 7 and Windows Photo Gallery was the default program used to open pictures, you might get the following error when you right-click a photo and click Edit:
“There was a problem starting C:\Program Files\Windows Photo Gallery\PhotoViewer.dll. The specified module could not be found.”
Why can't I right-click a picture to edit it?:
http://windows.microsoft.com/en-US/windows7/Why-cant-I-right-click-a-picture-to-edit
Ramesh Srinivasan, Microsoft MVP (since 2003) for Windows Desktop Experience. The Winhelponline Blog http://www.winhelponline.com/blog/ (Windows 7/Vista/XP Troubleshooting)