Sony BMG copy protection rootkit scandal

In 2005, it was revealed that the implementation of copy protection measures on about 22 million CDs distributed by Sony BMG installed one of two pieces of software that provided a form of digital rights management (DRM) by modifying the operating system to interfere with CD copying. Neither program could easily be uninstalled, and they created vulnerabilities that were exploited by unrelated malware.

Source: Wikipedia — Sony BMG copy protection rootkit scandal (CC BY-SA 4.0)