Windows Defender highlights:
- Provides robust protection from most types of malware
- Has a built-in firewall
- Phishing protection for IE and Edge browsers
- Parental control feature is available.
- Comes pre-installed in Windows OS; protection is enabled by default.
Emsisoft AntiMalware highlights:
- Double scanner
- Powerful active protection
- The free option is no worse than a paid one
- The program offers scanning options: deep, fast, selective, and smart