Sony

"As a copy protection measure, Sony BMG included the Extended Copy Protection (XCP) and MediaMax CD-3 software on music CDs. XCP was put on 52 albums[1] and MediaMax was put on 50 albums.[2] This software was automatically installed on desktop computers when customers tried to play the CDs. The software interferes with the normal way in which the Microsoft Windows operating system plays CDs, opening security holes that allow viruses to break in, and causing other problems. It is widely described as spyware."

en-wp:2005_Sony_BMG_CD_copy_protection_scandal

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Sony Scandal - Affected CDs, Boycott? November 22nd, 2005 in Sony Rootkit Scandal by Nils

"..Even barring any legal consequences for Sony over the XCP “protection” rootkit or their LGPL infringements, this thing could still turn out to be even more costly to Sony in terms of both money and lost consumer confidence in the company. There are now exploits that make use of loopholes left by the uninstaller provided by Sony. "


 * http://geek.pandemonium.de/2005/11/22/sony-scandal-affected-cds-boycott/