I am part of the desktop icons are missing? How the case?

I installed pc tools firewall, anti-virus Kabbah, 360 guardians of security.360 with a comprehensive system for medical examination, the system is state of health, 5 Star, played in all of the patch system, the firewall does not pop.Kabbah by scanning also No virus.Only some of the icons are missing, the other still!
matter how ah!

ah, what icon to disappear if the file directory to find ah pc tools that you put the firewall back, which The disappearance of the icon can not appear