A couple more tools to use:

Kapersky Rescue Disk - http://support.kaspersky.com/viruses/rescuedisk
VIPRE Rescue - http://live.vipreantivirus.com/

Free 30 Day trial with VIPRE Internet Security
VIPRE Internet Security 2012 - http://www.vipreantivirus.com/VIPRE-Internet-Security/

These tools are mainly for infected computers, but will help out with removal!

Anymore, free Antivirus programs are limited and may not be able to get the job done adequately . You are better off to pay for an antivirus program and if you do get infected the company should be able to help you remove without being on your own. You also pay for support with the paid antivirus programs, so get your use out of them!