a very good antivirus software that can detect viruses before they are added to the database because it has threat sense technology. v3, has the best interface, while the older versions had a very complicated user interface.
NOD32 beats the shit out of norton antivirus.
Pretty reliable anti-virus and firewall. Among the best there is for pr0n viewing (Along with McAfee's Site Advisor which tells you if a site's safe or been found to be bad). Coupled with Malware Bytes and Hijack This! it leaves your computer pretty safe. Also not a resource whore. I ran this on my 7 year old computer and there was no lag like there was with other firewalls. However, it isn't the holy grail either. Like with all other anti-viruses, have everything backed up and another around just in case.
Nod32 has saved my life a lot of times. I'm never touching Frostwire again!