I followed this guide in order to remove Cortana: https://winaero.com/blog/how-to-uninstall-and-remove-cortana-in-windows-10/
But now, when I open windows menu, the search doesn't work, nor can I get cortana back.
I factory resetted windows from scratch TWICE, but none of them work anymore, even when I check "use cortana" at the blue screen setting. (I see the cortana search window but it is disabled, But not the notebook)