My windows 10 PC is asking for a WiFi connection to finish the cast installation.
90/90 mb fiber internet - Zyxel router
connection from Zyxel to 3Com WiFi
-"- and 3Com switch
PC hard-wired to 3Com switch
Before upgrading my PC from Win 8.1 it was working like a dream.
Casting from my wifes Apple is working ok.