Sony is using rootkit technology in the digital rights management it puts on to some of their audio CD’s. This is the most invasive DRM I’ve heard about and could be very bad for your PC.
I have always recommended that people take extreme care when installing software from audio CD’s and movie DVD’s. Most of the time the software provides no useful function that other software doesn’t have and with this latest development it makes it potentially dangerous.
I first heard about this from a post on the PICList Tuesday and, it was the topic of this weeks SecurityNow podcast. To learn more about this issue visit the web page of the programmer who found it Mark Russinovich or, listen to the SN podcast.