As every year we offer an updated list of the best antivirus 2011

1. Norton Symantec Antivirus 2011
2. BitDefender Antivirus Pro 2011
3. Avast Antivirus Pro 5
4. G-Data AntiVirus 2011
5. Kaspersky Lab Anti-Virus 2011

Advice is always the same:
always test before you buy anti-virus on your PC for the trial period be granted so save a few days and you are sure that there are no compatibility issues.