Windows default shell and remote connection

Windows default shell and remote connection

Hi Support !

I have little problem. 

In my  PC i have two accounts  (Operator and Administrator). In Operator Account i change default shell in regedit (after login to Operator account , windows automatically starts Runtime without starts explorer.exe) It work very well BUT i noticed that i can not connect to machine in this situation using Zenon Enginiering Studio (Remote transfer) After start explorer.exe using task manager connection is estabilished. Could you exaplain me why Zenon needs Explorer.exe to connect or which process is starting by explorer.exe which allow Zenon to connect?

thanks
Patryk