Trend Micro Titanium Maximum Security 5.0

Free

Windows Defender is a powerful and easy-to-use anti-malware tool.

Detect and remove viruses, worms, Trojans, rootkits, and other malware.

This is an antivirus program with Internet security features.

Avira Internet Security protects you from Internet threats.

Protects users from malware, cyber attacks and online threats.