Folder thumbnail not showing on some folders

[Zynx]

So I have this problem on Windows 7 that some folders simply refuse to show the thumbnail be them music or video folders:

As you can the in the screenshots the Naruto, Naruto Shippuden and Movies folders don't display thumbnail previews like the others even though their subfolders all display their folder images/thumbnails.


If anyone could help me to solve this annoying issue I would be grateful.

 

[Snick]

Hi Zynx,
Welcome to SevenForums
Peruse: this post

 

[Zynx]

Hi Zynx,
Welcome to SevenForums
Peruse: this post

I'm not sure if I explained properly so sorry for that. What I want is for the folders that aren't showing the thumbnail previews to actually show them like the others instead of this icon like if the folder was filled with documents. This also happen on some video folders I have.

There aren't any images in the subfolders, just the song/video files.