Microsoft AntiSpyware to remove Sony Rootkit
Microsoft's security tools will be updated to detect the controversial Sony BMG copy protection software installed on PCs when some audio CDs are played, the software giant said over the weekend.
http://blogs.technet.com/antimalware/archive/2005/11/12/414299.aspx
It seems that the patch to remove the rootkit contains a new security vulnerabilty. http://hack.fi/~muzzy/sony-drm/
And if you think this isn't a widespread issue take a look at the figures on DoxPara
Sony's Web-based unistaller opens a big security hole