Norton Reputation Service instantly checks where files came from and how long they’ve been around to identify and stop new crimeware faster than other, less sophisticated security software. Norton Protection System uses several overlapping layers of protection that work together to stop viruses, spyware and other online attacks. Norton Pulse Updates provides up-to-the-minute updates that protect against the latest threats without slowing down your computer. SONAR 3 Behavioral Protection monitors your PC for suspicious behavior to quickly detect new online threats.