Other Death Note folder icons: [link]
Use this [link]
to convert the .png image into a .ico file. Windows icons use the .ico format
size ''Original size''. (Often I do Original size and 512 x 512)
Then Right click the folder and go to "properties" and click the "customize" tab then click "change icon" and then "browse" and find the location that you saved your .ico file. Select the .ico and hit ok
And you have new folder icon.
If an icon does not work then here's a list of Hetalia's folders in ICO version for download. [Free][link]
Just click on the name of an icon.