This is the best anti-malware software of 2012. It's great at both blocking and removing malware.
2. avast! Free version
This version has new features and a great look, along with a boot-scan that strikes at malware.
3. Avira Free Antivirus 2012
Lacking little from the premium version (save Web protection and live support).
4. Comodo Cleaning Essentials
Sometimes malware will prevent you from installing new anti-malware software. Comodo Cleaning Essentials doesn't need installation; run it from a USB drive to counter this and other problems.
5. Malwarebytes' Anti-Malware
The free version of Malwarebytes is the software that tech support people at other anti-malware companies tell customers to install when a virus becomes entrenched. It's a clean-up pro.
6. Norman Malware Cleaner 2.1
Norman Malware Cleaner doesn't need to be installed and it works in Windows Safe Mode, so it could be the quick fix your infected system needs.
7. Norton Power Erasier
Coupled with the commercial Norton 360, this software sets records for malware removal in tests. By itself, it's plenty powerful at finding threats missed by other anti-malware tools.
8. Panda Cloud Antivirus
The cloud holds all the virus signatures used by this software, so you need to be connected to the Internet to use it—but it runs fast because of that fact.
9. ZoneAlarm Free Firewall
Our Editors' Choice for free firewalls, ZoneAlarm configures network permissions for your programs automatically, blocks phishing websites, can't be disabled by malware, and provides all-around excellent protection.