There is a category between intended and unintended installation: the “unintended but authorized” category. This was the “infamous” rootkit installation technique chosen by Sony when they released the “Van Zant” CD. By providing necessary software that requires acceptance of a license agreement that in turn authorizes the insertion of a rootkit, many legal loopholes can be circumvented. Unfortunately, as with Sony, this can become a very embarrassing public relations problem and damage the reputation of an otherwise reputable company. As such, this installation technique is not recommended.