BEST Anti-Virus? There is NO such thing.
The "best" Anti-Virus for each individual user will vary according to several criteria:
- Interface/Ease of use
- Detection rate
- Performance/Resource usage
- Price
- Support, service etc.
If you are going to choose an AV solely based on how many malware it detects, then you should check
AV-Comparatives and look at the detection rates for all the tested AntiVirus programs. The On-Demand comparative determines the detection rates at maximum settings and the Retrospective/Proactive comparative test determines the zero-day/heuristic/proactive protection ability of the AntiVirus programs. Basically any AV that gets an "Advanced" rating or better in the On-demand comparatives at AV-comparatives will provide good protection.
You should try all the AVs tested on AV-comparatives and make your decision. In my opinion AVG*, BitDefender, NOD32, F-Secure (Kaspersky engine), and ArcaVir (
ArcaBit - antivirus software - ArcaVir) are all good AVs.
* = AVG Paid editions have noticeably higher detection rate than AVG free edition. The listing of editions is as follows:
AVG Anti-Virus Free edition: Anti-Virus only (protection from viruses, trojans, worms)
AVG Anti-Virus Professional edition (Paid): Anti-Virus + Potentially Unwanted Program detection (Adware, Spyware, Dialers, etc.)
AVG Anti-Malware edition (paid): Anti-Virus + Potentially Unwanted Program detection + Additional trojans and adware/spyware/dialers/riskware detection by use of the Ewido Anti-Spyware engine.
AVG Internet Security (paid): All of the above.