Friends: I am a new user of Nod32 version 18.104.22.168. I downloaded the trial version and I would lke to ask you this: First: When I update the viruses bases I saw : 1.- Engine0.nup. 2.- Archs0.nup 3.- Archs1.nup 4.- Adverup. 5.- Expire.rar. Would you please to tell me what does these names means? Thanks in advance. Regards.