What is the best "FREEWARE" virus protection software on the internet?

I have used Zone Alarm Firewall, I have also got superantispyware and Malwarebytes. They are all free for personal use and I have had no trouble with Viruses Trojans Hackers etc. I have just changed to Avast antivirus and all seems good so far. Zone Alarm allows a lot of personal configuration unlike the Windows Firewall. They can all be downloaded from a href="http://www.download.com/" rel="nofollow"http://www.download.com//a I also use Windows Defender from the Microsoft site. It is safe to use two anti-spy products but never use more than one A/V as it can cause conflicts. You should run A/V and anti spy weekly. Hope this helps