Rootkit
The exposure of Sony BMG Rootkit scandal five years ago is indeed very significant in IT history. Sony BMG secretly included Extended Copy Protection (XCP) and MediaMax CD-3 software on millions of music CDs from artists such as Celine Dion, Neal Diamond and Santana in the mid-2000s.
Cybercriminals are making every effort to inject Malware in your system so that it is going to be difficult to detect.
The latest security update for Windows XP can not be installed on those machines which are infected by Rootkit virus.