"SysInternals.com guru Mark Russinovich has a detailed investigation of a rootkit from Sony Music (http://www.sysinternals.com/blog/2005/10/sony-rootkits-and-digital-rights.html). It's installed with a DRM-encumbered music CD, Van Zant's "Get Right with the Man". (Mmmm, delicious irony!) The rootkit introduces several security holes into the system that could be exploited by others, such as hiding any executable file that starts with '$sys$'. Russinovich also identifies several programming bugs in the method it uses to hook system calls, and chronicles the painful steps he had to take to 'exorcise the daemon' from his system."
From Slashdot. Read More... (http://it.slashdot.org/article.pl?sid=05/10/31/2016223&tid=172&tid=158)

Ouch you would think you could trust something like that but it just goes to show you really have to be careful what you install. It almost makes you want to setup a second computer just to do test installs on so you dont screw up your main computer.

NO kidding. Stupid record labels still don't get it. I refuse to buy anything that violates my right to make a backup under copyright law.