The SonyBMG rootkit was a program installed on Sony music CDs that was intended to prevent copying but ended up opening security holes that allowed viruses to infect computers more easily. It affected around 500,000 networks and took 3 months for Sony to release a removal tool. The rootkit altered the way Windows operating systems read CDs and allowed easier virus infections by opening security holes, though its creator intended it only as anti-copying software. To remove the rootkit, the Sony utility would need to be used.
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