The rootkit is a nasty software that is virtually undectable and uninstallable. It is a form of spyware. Sony had the rootkit on their music cd's and when you played the disk on your computer it installed itself on your computer. Here are some webpages that talked about it:
http://www.betanews.com/article/Sony_to_Help_Remove_its_DRM_Rootkit/1130965475
http://www.betanews.com/article/Lawsuit_Fights_Back_Against_Sony_DRM/1131635264
http://www.betanews.com/article/Sony_President_Rootkit_of_No_Concern/1131475197
http://www.betanews.com/article/Trojan_Horse_Hides_Using_Sony_Rootkit/1131640601
