Free: Microsoft Security Essentials

http://www.microsoft.com/security_essentials/

NOD 32 免费赠送

http://www.eset.com.cn/edm/index.php?action=spread&id=43692&content=ESET NOD32

How to Remove the Popup Ads in Avira Antivir

http://www.wikihow.com/Remove-the-Popup-Ads-in-Avira-Antivir

Make Avira AntiVir (Free Edition) More Usable

http://www.tipsfor.us/2007/08/15/make-avira-antivir-free-edition-more-usable/