http://www.malwarebytes.org/mbam.php
http://www.spywareterminator.com/es/
http://www.lavasoft.com/products/ad_aware_free.php?t=overview
http://www.safer-networking.org/es/index.html
http://www.microsoft.com/downloads/details.aspx?displaylang=es&FamilyID=435bfce7-da2b-4a6a-afa4-f7f14e605a0d