RegistryGreat (a.k.a Registry Great 5.2) is a rogue registry cleaner - a fake registry cleaner, which uses scare tactics to convince the user that he is in need of a registry cleaner. This is usually done by displaying misleading warning messages (usually popups and fake system notifications) of non-existent registry errors and such. RegistryGreat usually makes it's way to the system by using trojans, such as Zlob or Vundo.
