Delete and Reset Windows Vista Folder Views or Folder Types Settings to Default Clean State

1. Click on Start button.
2. Type regedit in the Start Search box, and press Enter to run Registry Editor.
3. Click Continue on User Account Control dialog prompt.
4. In Registry Editor, navigate to the following registry branch:

   HKEY_CURRENT_USER\Software\Classes\Local Settings\Software\Microsoft\Windows\Shell\Bags

   

   Right click on Bags registry key in the left pane, and click Delete.

5. Click Yes when prompt for confirmation to delete the registry key and all its subkeys.

   

6. Next, navigate to the following registry key (it should be just below):

   HKEY_CURRENT_USER\Software\Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU

   

   Right click on BagMRU registry key in the left pane, and click Delete.

7. Click Yes when prompt for confirmation to delete the registry key and all its subkeys.

   

8. Close Registry Editor.
9. Log off and log on again or restart computer so that the registry keys can be rebuilt and recreated.
10. After logged on, open Windows Explorer, go to Folder Options (Organize -> Folder and Search Options) View tab, and make sure the Remember each folder’s view settings is checked.
11. To ensure that any changes to Folder settings in Explorer window, close the Explorer window after changes to save the settings. Windows Vista will only remember the state of folders of the window is closed.

Source