hi, wilders security forums buddies, I've heard avast doens't use advanced heuristic detection engine. Is that true? if this is the truth when avast thinks to change it? every one knows the advanced Heuristic detection Engine - Protects against unknown viruses because the most advanced antivirus machine employs the latest heuristic techniques to identify previously unknown viruses and Trojans. 'Heuristics' describes the method of analyzing the code of a file to ascertain whether it contains code typical of a virus. If it is found to do so then the application will disinfect the file or recommend it for quarantine.This is a quantum leap in the battle against malicious scripts and programs as it allows the engine to 'predict' the existence of new viruses- even if it isn't contained in the current virus database. this is the formula to be the most efficient antivirus.I expect this truth will shift sooner.as I read in the avast support forum, perhaps only the avast 5.0 will proceed with that "proactive detection (or, rather, prevention of zero day malware) is (as already announced) one of the hottest topic of the new version. But of course, even the current version of avast ( 4.8 ) engine contains a couple of methods designed to tackle yet-unknown malware." best regards. ps: for the time being what should I use to be protected against unknown viruses ?