Eset Smart Security's heuristics analysis is giving us false sense of security when it comes to detecting new and unknown viruses. Compared to other AV's heuristics analysis technique, ESET is much inferior (though Advanced Heuristics is capable of detecting the same virus). Given a new and unknown virus, heuristics analysis alone of ESET cannot detect it. Pls see my comparison: Sample: a virus that duplicates using filename similar to that of a folder name where it (virus) resides Modes are: No Heuristics; Heuristics; Advanced Heuristics 1. ESET Smart Security - no detection; no detection; probably unknown NewHeur_PE virus 2. Dr. Web CureIt - no detection; probably WIN.SCRIPT.VIRUS; N/A Both AVs have the same date of definition files (September 17, 2007), outdated Guys! If ESS Advanced Heuristics == other AV's Heuristics, then what's the use of ESS's inferior heuristics? This is just my obeservation. And I believe using Heuristics Analysis alone (not Advanced Heuristics) will give us a false sense of security, especially for a new and unknown viruses. And hey! dont forget that the default setting of 'Real-time file system protection' is set to Heuristics analysis only. Note: Im using CureIt only as a "First Aid Kit"