Adware.Vapsup is an irritating adware application, which is created to display unwanted popup advertisements. Once executed, Adware.Vapsup will drop files into several system directories and modify the registry in order to register itself as a browser add-on. In addition, Adware.Vapsup is able to hide itself deeply in the system and reappear after the removal, thus it might be very difficult to remove Adware.Vapsup manually. Adware.Vapsup is designed to display commercial advertisements based on the web sites the user browses.