The fact is whatever I tried in one screen it was copied to others. Anyway, I played with hidding and showing. This screen it is my third monitor, so I tried all the options. It works for me if I set the aida64 sensor panel with the option TOP checked and them hidde the taskbar, and just show it again. Magic! The taskbar is showed in the 2 main moitors but the one for 7" remains at bottom of sensor panel, as i want. So thats perfect for me. Hope this help.