COMODO Internet Security 4.1

Free

Protects your computer from viruses, spyware, ransomware, and other malware.

Protects users from malware, cyber attacks and online threats.

ZoneAlarm Internet Security Suite protects you from viruses and other threats.

Tracks down and destroys any existing malware hiding in a PC.

Free

Detects viruses and hidden processes that may be lurking on your computer.