How do you uninstall elefun desktop backgrounds?

I installed an elefun desktop background for fun to see if it would actually work ( and my spyware said that it was and still is safe). Now, like 15hrs later, I'm trying to delete it but I have no idea how to close the desktop walpaper. I've tried changing it already but that takes me to my "second desktop." HELP!!!!!!!!! HOW DO I DELETE THIS????? Thank You!!! :D|||u need to go to control panel and then go to add and remove programs click that and then look for the item that u dont want click on unistall and then u will begin to unistall the program that u dont want