OK followed this, when I downloaded Zadig there was nothing in the drop down menu, i had to select list all devices, now STM32 virtual com port came up and I installed the driver. I am now mining BTC side but my Scrypt side now fails even with the --dual option added to the bat file!!!

There is no where in the drop down menu that i have the same option as on the how to link "cp2102 usb to uart bridge controller "