Important: There are no "on-demand only" (without constant virus protection), trial, or shareware antivirus programs in this list. These are the best antivirus programs that are completely free and work similarly to expensive programs from companies like Norton and McAfee.
Anti-Virus Free from AVG is the best free antivirus software available. AVG Anti-Virus Free is a full-fledged antivirus and antispyware tool, includes an email . There is no need to pay for an antivirus program when the best free antivirus software in the world is just a download away.downolad
avast! Free Antivirus
avast! Free Antivirus supports Windows 7, Windows Vista, Windows XP and Windows 2000.
Microsoft Security Essentials
Security Essentials from Microsoft is definitely one of the best free antivirus programs available right now. Microsoft is relatively new to the antivirus game but don't let that scare you - Security Essentials is a fantastic antivirus program that protects you from all sorts of malware, updates automatically, and is incredibly easy to use.
Microsoft Security Essentials supports Windows 7, Windows Vista and Windows XP.
Comodo Antivirus works on Windows 7, Windows Vista and Windows XP.
Avira AntiVir Personal
Avira AntiVir Personal protects you from viruses, Trojans, wo rms, spyware, adw are, and various other kinds of malware, making it a fully functional antimalware tool and certainly one of the best free antivirus programs.
Avira AntiVir Personal works on Windows 7, Windows Vista, Windows XP and Windows 2000. Avira also makes a version of AntiVir Personal for UNIX.
Panda Cloud Antivirus
Panda Cloud Antivirus protects you from several kinds of malware threats - viruses, worms, Trojans, adware, and more - just like all the other free antivirus programs in this list.
What makes Panda Cloud Antivirus one of the best free antivirus programs is that it does its job from "the cloud" meaning the hard antivirus work that typically slows d own a computer is done on computers elsewhere on the Internet, freeing up your computer to work like it should and protecting you from malware even better.
Panda Cloud Antivirus supports Windows 7, Windows Vista and Windows XP.
Immunet Protect FREE
Immunet Protect FREE is a unique, cloud-based antivirus program, much like Panda Cloud Antivirus. Immunet Protect FREE protects your computer from bots, worms, viruses, Trojans, keyloggers, and spyware.
Immunet Protect FREE works on Windows 7, Windows Vista and Wi ndows XP. You must also be connected to the Internet at all times.
digital-defender Antivirus isn't a popular antivirus program but it should be. It's certainly one of the best free antivirus software programs you'll find. It's a full antivirus and antispyware program and updates on a daily basis.
digital-defender Antivirus supports Windows 7, Windows Vista and Windows XP.
PC Tools AntiVirus Free offers basic protection against viruses and other malware. While not my favorite, AntiVirus Free is still one of the best free antivirus programs you''ll find
PC Tools AntiVirus Free works on Windows 7, Windows Vista and Windows XP.