Best Antivirus which should be free to download?

i have panda antivirus but

still any other better one

Best Antivirus which should be free to download?antivirus scan

Free Anti-Virus

1) Avast!(Real Time Protection)

http://avast.com/eng/download-avast-home...

2) Avira AntiVir PersonalEdition Classic(No Real Time Protection)

http://www.free-av.com/antivirus/allinon...

3) Clam AV(Real Time Protection)

http://www.softpedia.com/get/Antivirus/C...

Free Anti-Spyware(Although Avast! also Protects Against Spyware)

1) Spyware Terminator(Real Time Protection Can be downloaded with Clam Av)

http://www.spywareterminator.com/dnl/lan...

2) Spybot: S%26D(No Real Time Protection)

http://spybot.com/en/mirrors/index.html

3) Windows Defender(Real Time Protection, included with Microsoft Windows)

Free Firewall

1)Sunbelt Firewall(30 day full version trial then switches to free version still the best free Firewall)

http://www.sunbelt-software.com/Home-Hom...

2)Zone Alarm Firewall(click on basic protection only)

http://www.zonealarm.com/store/content/c...

3)Comodo Firewall

http://www.personalfirewall.comodo.com/d...

Free Security Suites(Includes Anti-Virus,Anti-Spyware,Firewall,Spam Protection,etc.)

1)Cyber Defender Free 2.0(can't believe this company is giving away a free internet security Suite the family pack costs money though legitimate too)