On this page you will find the best free antivirus software for Windows
Do we really need to pay for antivirus protection … here is a selection that would seem to say NO!
avast! Free Antivirus
Expect great all-around protection against viruses and trojans.
AntiVir Free Version
Lightweight and solid. Good ratings. Worth looking into.
AVG Antivirus Free Edition
Not as good as Avast or Avira but with considerably less bloat. The most popular free antivirus.
Microsoft Security Essentials
Simple, effective and lightweight protection suite.
Comodo Internet Security
Free security suite, includes both a firewall and anti-virus protection.