There are four scanning modes, “Reputation Scan”, “Quick Scan”, “Full System Scan” and “Custom Scan”, each with its very own configuration settings. Of course, the third one takes a lot of time and uses a moderate amount of computer resources, but it checks every single file on your machine to make sure you're on the safe side.
Norton AntiVirus offers:
- Ranked #1 in performance
 - Industry-leading protection
 - Easier to use Control Center and features.
 - Award-winning speed, performance and protection just got better.
 
Key features :
Say goodbye to viruses:
- It's okay to blink, because we never do – SONAR technology and live 24x7 Threat Monitoring watch over your PC for any suspicious behavior to quickly identify threats.
 - Download away – we scan the files you download and eliminate online threats that we find.
 - Deep clean your PC – our powerful Threat-Removal Layer targets and scrubs out aggressive, hard-to-remove infections that less sophisticated products often miss.
 - Harness global power – only Norton can bring you the ultra-fast Network Defense Layer to block a multitude of threats before they can even touch your PC.
 - Protection from the future, available today – our exclusive reputation and behavior antivirus technology are so advanced that they can stop online threats that bad guys haven't even created yet.
 - Keep out trespassers – Browser Protection blocks unsafe websites that secretly download software that can steal personal information or take over your PC.
 
Requirements:
- 300 MHz or faster processor
 - 256 MB of RAM (512 MB RAM required for the Recovery Tool)
 - 150 MB of available hard disk space.
 - CD-ROM or DVD drive (if not installing via electronic download)
 

