Green boxes w/white check marks on doc icons & everything on desktop

since i activated Norton 360 i started getting green boxes (with white check marks inside of them) on all of my document icon and they are also on all of the links and thumbnails on my desktop.....they are large, ugly and annoying......can someone please tell me how to get rid of them?? they r also on all of my files, etc in My Documents folder....i think they r there to show me Norton has checked them but i have to find out how to get rid of them....please help if u can, thanks