- AVG Anti-Virus 9.0

> http://free.avg.com/ww-es/antivirus-gratis-avg

- Avast

> http://www.avast.com/free-antivirus-download#tab4

- Avira

> http://www.free-av.com/en/download/1/avira_antivir_personal_free_antivirus.html

- Microsoft Security Essentials

> http://www.microsoft.com/Security_Essentials/

- Panda Cloud Antivirus

> http://www.cloudantivirus.com/es/

- USB Vaccine USB

> ttp://www.pandasecurity.com/spain/homeusers/downloads/ usbvaccine/