When you click an image icon in Windows Explorer, the picture preview maynot be displayed in the left pane.
NOTE: Previews are available only if you have the View As Web Page option enabled for the folder that contains the image file.
This behavior can occur if the file association for the type of file that you are trying to preview has been changed by a third-party program.
Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:
322756 How to back up and restore the registry in Windows
To resolve this issue, verify that the following registry entries exist for the type of file that you are trying to preview: