MOREnet does not endorse any of the following products.  Read all licensing agreements for possible restrictions on use of product.

AVG Free
http://free.avg.com

Avast! Free Antivirus
http://www.avast.com/free-antivirus-download

Avira AntiVir Personal
http://www.avira.com/en/avira-free-antivirus

BitDefender Free Edition
http://www.bitdefender.com/solutions/free.html

Clam AV (no real time protection but good removal tools)
http://www.clamav.net/lang/en/

Comodo (firewall and antivirus)
http://personalfirewall.comodo.com/free-download.html

F-Secure Easy Clean
http://www.f-secure.com/en_EMEA-Labs/security-threats/tools/easy-clean/

Microsoft Security Essentials
http://www.microsoft.com/security_essentials/

Rescue CDs (most contain Anti-virus functionality as well as file recovery)

AVG Rescue CD
http://www.avg.com/us-en/avg-rescue-cd

Avira AntiVir Rescue System
http://www.avira.com/en/support-download-avira-antivir-rescue-system

F-Secure
http://www.f-secure.com/en_EMEA-Labs/security-threats/tools/rescue-cd/

Dr. Web Rescue CD
ISO Download: ftp://ftp.drweb.com/pub/drweb/livecd/
Instructions: http://www.techmixer.com/free-bootable-antivirus-rescue-cd-dr-web-livecd/

Kasperksy Rescue Disk
ISO download: http://devbuilds.kaspersky-labs.com/devbuilds/RescueDisk/
Instructions: http://www.techmixer.com/kaspersky-rescue-disk-2010/

Shardana Antivirus Rescue Disk Utility (SARDU)
http://www.sarducd.it/

Trinity Rescue CD
http://trinityhome.org