Anti-Malware Engineering Team : Sony DRM Rootkit
This is microsoft’s official stand on the Sony DRM Rootkit.
We use a set of objective criteria for both Windows Defender and the Malicious Software Removal Tool to determine what software will be classified for detection and removal by our anti-malware technology. We have analyzed this software, and have determined that in order to help protect our customers we will add a detection and removal signature for the rootkit component of the XCP software to the Windows AntiSpyware beta, which is currently used by millions of users.