Sony BMG, the only major record label that refused to sign up to the Apple iTunes Australia store, has been caught red-handed taking Digital Rights Management measures that put a trojan onto Windows computers. It puts files disguised as device drivers onto the computer. Attempts to remove the files may end up in your CD/DVD drive being disabled.
The DRM does allow limited copies of the music to be made, but not in a form playable on iPods. Sony blame Apple for this, even suggesting that people complain to Apple, despite that it’s Sony’s DRM that stops it working.