this doesn't sound good at all:

Sysinternals' Mark Russinovich has performed an analysis of the copy restriction measures deployed by Sony Music on its latest CDs: which he bluntly calls a 'root kit'. Using conventional tools to remove Sony's digital media malware will leave ordinary users with Windows systems unable to play CDs.

...

A 'root kit' generally refers to the nefarious malware used by hackers to gain control of a system. A root kit has several characteristics: it finds its way onto systems uninvited; endeavors to remain undetected; and then may either intercept system library routines and reroute them to its own routines, or replace system executables with its own, or both - all with the intention of gaining system level ownership of the computer.

What makes Sony's CD digital media software particularly nasty is that using expert tools for removing the parasite risks leaving you with a Windows PC that's useless, and that requires a full reformat and reinstall.

luckily it looks like sony is about to get their pants sued off. also, it seems that someone is already designing a program to rid the sony spyware without damage.

this is just one reason of many why i refuse to buy copy protected cds. via the sound-scavengers list.