Uninstall the Microsoft V4/Class driver and put the Xerox driver back on it (V3 one) and do not choose the printer from the provided list, add it manually by IP address or MS will just change the driver again on the next reboot.
I upgraded from Windows 7 to Windows 10 and now cannot printo multiple copies to my Xerox Phaser 6180. It allows me to select a multiple number but only prints out one copy.