Norton AntiVirus 2010 defends your PC against viruses, spyware, bots, worms, and more without slowing you down or getting in your way. Intelligence-driven technology identifies and targets only files at risk, for less frequent scans and the fastest scan speeds in the industry.1 Vulnerability. Protection prevents threats from exploiting security holes in your PCs software. Pulse Updates every 5 to 15 minutes and real-time online security checks help.