1) Kaspersky: 41.73%

2) Avira AntiVir: 13.88%

Poll results for 2009:

3) ESET NOD32: 7.81%
Free download links for the Reliability:

AVG Anti-Virus Free Edition:http://download.cnet.com/AVG-Anti-Vi...-10320142.html

Avira AntiVir Personal:
http://download.cnet.com/Avira-AntiV...-10322935.html

Avast Free Edition
http://download.cnet.com/Avast-Free-...-10019223.html

Microsoft Security Essentials
http://download.cnet.com/Microsoft-S...-10969260.html

PC Tools Antivirus Free Edition
http://download.cnet.com/PC-Tools-An...-10625067.html