Crash explores resources

Hi, I have a problem with my windows 10
I've always had a cortana in the icon then right of the windows symbol (the lower left one) today I tried to put it in the search bar as almost all windows 10, so the search bar with the symbol of the microphone at Always left of the windows symbol.
I put it right-click in an empty part of the taskbar> cortana> show search bar ... the pc is a few seconds down and then the search bar appears, but immediately after the black screen for a second, after reappearing the screen And then black again for a second, then reappear the desktop for a few seconds and again black (the desktop sometimes appears empty, sometimes with icons etc and it does all this infinitely, the only thing i can do Is to start the task management with ctrl + alt + canc and I see from there that crasha explores resources and reopens.
Do you know how to do it? From activity management I can start new processes, do you know some process to disable cortana or customize the application bar or something else? Thanks