ESET NOD32 key features include:  
Utilizes a very low amount of system resources.
Extremely high detection rates, leading to numerous prestigious Virus Bulletin 100% Awards for detecting all viruses listed by The WildList Organization International.
Search speed maximized through associative multilevel cache and low-level code optimizations.
Unprecedented heuristic analysis capable of exposing DOS, Boot, Win32, macro, script and other viruses.
Uses fast "single point" samples and CRCs for precise identification.
Built in powerful virtual emulator which detects the most sophisticated polymorphic and metamorphic viruses.
Heuristic and algorithmic methods to clean viruses.
Reconstructs the most important system areas (functions) in the event of an infection.
Cleans macroviruses and restores documents to their original format.
Detects viruses in encrypted password protected databases and documents.
Detects viruses in compressed or protected executable files (PKLite, LZexe, Diet, Exepack, CPAV).
Modularized native 32-bit code.
Why use ESET NOD32?  
 Other anti-virus software products take complete control of your system and can prevent you from using your applications normally.  ESET NOD32 unobtrusively sits in the background providing world class protection without making major changes to your applications or system settings.
 With ever-increasing numbers of viruses appearing, it is important to be able to download anti-virus file updates quickly and easily. Other anti-virus products can be difficult to set up to automatically download these updates but ESET NOD32 does it all for you. It can be set to check every hour if you so wish, and uses the time you are on the Internet to check to see if there is an update available. If there is, it will download it automatically, telling you it has performed the action.
NOD32 - Product Awards  
NOD32's detection efficiency combined with 2-50 times faster hard disk scanning rates has earned the product many international prestigious awards. ESET NOD32 is the world leader of the Virus Bulletin 100% Awards having won more awards (60) than any competing product. Since its first submission for testing in May 1998, NOD32 was the only tested product that has never missed a single In the Wild virus. ESET NOD32 has been selected as the "Best Antivirus of 2004" by Australian PC User magazine, "Best Buy, Best Performance, Best Value" by the independent UK Consumer's Association.