A lot of customers in my business ask about what we recommend for free anti-virus. First of all, I will never say that a free solution offers you the best computer protection. As far as NOT free, I recommend Vipre or Bit Defender. Both are excellent.
However, there are two very good FREE solutions as well. Here are links for both the FREE and PAID programs:
Free:Avira AntiVirus plus Anti Spyware (Link:
http://www.download.com/Avira-AntiVir-Personal-Free-Antivirus/3000-2239_4-10322935.html?tag=contentBody;mostPopTwoColWrap&cdlPid=10986298)
AVG AntiVirus (Link:
http://www.download.com/AVG-Anti-Virus-Free-Edition/3000-2239_4-10320142.html)
NOT free:Vipre AntiVirus plus Anti Spyware (Link:
http://www.sunbelt-software.com/sap/c/?aff_id=56213&p=411&b=411a)
BitDefender AntiVirus plus Anti Spyware (Link:
http://www.bitdefender.com/)