Some people might’ve changed icons for certain folders, and therefore have lost the original icons. I foresaw this, and decided it would be good to kinda make a ‘back-up’ folder with all of the original icons. While I don’t have the original icon for ALL of the folders, I have most of them for the important ones (Ex: HD, Apps, Users…).
You can download the original icons here.
For instructions on how to change icons, go to the guide.