Getting antivirus software installed on infested test systems often requires a lot of back-and-forth with tech support.Norman is the only vendor I can recall that simply gave up when malware prevented installation.
It long, slow scan left a lot of malware behind, especially rootkits. There are many better choices.
I have almost nothing good to say about Norman Antivirus.
It couldn't even install on two of my infested test systems, and its malware removal scores are among the lowest.Even on a clean system a full scan took more than three times as long as the average antivirus; on infested systems it took even more time.
Review about: Antivirus Software.