mcafee.com/activate Antivirus is a software that provides a wide variety of virus detection methods as it not only prevents viruses from entering your computer system but kills or quarantines viruses that have broken through the firewall. McAfee Antivirus also blocks malware which includes malicious websites, rootkits, Trojans, viruses and phishing schemes. It gives you in-browser reports about the threats it blocks. McAfee Antivirus lists the IP addresses connected with the threat, which allows tech-savvy users to avoid websites connected to those addresses.