Norton AntiVirus offers some of the best protection available for viruses. The client also offers excellent help resources for viruses through the Web, especially the incomparable AntiVirus Research Center. While no slouch at detecting viruses, Norton AntiVirus does lack the blitzkrieg-like speed of its closest competitors. Still, if you're looking for a relatively fast, extremely dependable virus scanner with free updates and excellent online help resources, Norton AntiVirus remains your best bet.