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Windows XP Tips, Illustrations and registry edits
Occasionally, the system folders such
as Program Files, My Music or My Documents may display invalid image
file while in Thumbnail view. As the system folders do not have a
Customize tab in the Folder Properties, it's not possible to change
or remove the Thumbnail picture via the user interface. Here are the
steps you need to perform in order to reset the thumbnail picture
for system folders.
Phase I: Reset all the folder view settings
Now the Thumbnail reference for the system folder is removed from the registry. The above steps, of course, resets all of the folder view settings. But never mind, you can customize them again.
Phase II: Delete the Thumbs.db - Thumbnail database
With this done, Windows XP still maintains the thumbnail cache of the folder picture. You will need to enable Windows Explorer to Show all files and then delete the file thumbs.db inside the particular folder.
The thumbnail image for a folder is stored in the following area of the registry:
HKEY_CURRENT_USER \ Software \ Microsoft \ Windows \ ShellNoRoam \ Bags \<number>\Shell
in a REG_SZ value named Logo (containing the full path to the image file)
<number> varies for each folder. While you can reset an individual folder preference by locating the <number> for that special folder using Process Explorer, it may be time consuming. Simple reset all folder view would be enough.
Example: (see Fig:3)
HKEY_CURRENT_USER \ Software \ Microsoft \ Windows \ ShellNoRoam \ Bags \ 1 \