SOURCE: http://naijatech.net/2014/09/steps-in-changing-the-icon-of-a-folder-on-your-computer/

Do know that you can easily change the icon on a folder to your desired image? if no then this article is for you.

Changing the icon of a folder on your computer is easy. Many people will love to use their image as the icon of a folder and this could be of help.
After reading this article you will be able to use your desired image as the icon of a folder.
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Follow the
Steps Below
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1. Right-click on the folder that you want to change its icon.
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2. Select “properties” from the menu.
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3. Click the “customize” tab, in the properties window and then click on the “change Icon” button, which is located in the”Folder Icons” section at the bottom.
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4. Now click the “Browse” button and then go to the folder that the icon image is located.
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5. Navigate through the list of Icon images and select the icon image of your choice.
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6. Click "OK" after selecting your icon.
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That is all. I hope you will be able to change the icon image of a folder with this.
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Thank you for taking your time to read this article, we hope to see you here again.