In November 2005, it was revealed that Sony was distributing albums with Extended Copy Protection, a controversial feature that automatically installed rootkit software on any Microsoft Windows machine upon insertion of the disc. In addition to preventing the CDs contents from being copied, it was also revealed that the software reported the users' listening habits back to Sony and also exposed the computer to malicious attacks that exploited insecure features of the rootkit software. Though Sony refused to release a list of the affected CDs, the Electronic Frontier Foundation identified "Nothing Is Sound" as one of the discs with the invasive software.