Toady, more and more virus writers become to use obfuscation technology such as packing,encrpyting or polymorph in order to escape form detecting by anti-virus software. And more and more virus is designed to aim at specific anti-virus software which are mainly used. As the security expert siad,the major anti-virus software such as NORTON does not perform best detection rate is mainly because the increased sophistication of malware authors, who have developed a wide range of approaches to minimizing the susceptibility of their product to heuristic detection, and who test the effectiveness of these approaches against suitably updated and configured scanners. When NOD32 has more and more users,ESET will face that issues. As a matter of fact,a lot of virus has been designed to against advanced heuristic of NOD32 by using obfuscation technology.For example,some packers are used to obfuscate emulation technology. IMO,there are two solutions.One is use multi-engine,another is quickly update. How will ESET solve this issues?