There are a set of anti virus softwares available in the market. But, I, think that followins are top 10 anti virus.
PC Antivirus Pro.
Avast! Pro Antivirus Pro.
BitDefender.
Comodo Antivirus.
Panda Antivirus.
Kaspersky Anti-Virus.
AVG Anti-Virus .
Norton Internet Security.
Spyware Doctor with Antivirus.
Avira AntiVir Premium.