and removing it kills Windows.
From the Register,
"Sysinternals' Mark Russinovich has performed an analysis of the copy
restriction measures deployed by Sony Music on its latest CDs: which he bluntly
calls it a 'root kit'. Using conventional tools to remove Sony's digital
media malware will leave ordinary users with a dead Windows
systems.
While the Sony CDs play fine on Red Book audio devices such as standard
consumer electronics CD players, when they're played on a Windows PC the
software forces playback through a bundled media player, and restricts how many
digital copies can be made from Windows."
Avoid Sony CDs.. if you can.. scary stuff.