DNS Changed, a undesired PUP.
DNS Changed has been listed as adware or PUP infection that benefits its developer and partners by promoting advertisements on IE, Firefox and Chrome intrusively. Adware like DNS Changed mostly secretly comes into Windows systems when user install free software from unknown third party websites, hence you should always pay attention to those pre-checked items and choose Advanced install in the installation, in order to make sure no other undesired apps installed.
