DNSChanger.bf is a malicious Trojan that may present security risk for a compromised PC system or a network environment. DNSChanger.bf should not be taken lightly and contains characteristics of a severe security risk. DNSChanger.bf penetrates the system without the user’s knowledge or permission and easily contacts a remote server to download other harmful parasites and malware onto the infected computer. Symptoms include your computer screen flipping upside down or inverting and documents or messages printing on your printer by themselves. For the safety of your computer, remove DNSChanger.bf immediately.