Can't get windows 10 to boot (no os or boot seen)

I have a new macpro with lots of memory ram and other wise
using sierra
I am able to load my 7
I have a key for 10 (just downloaded it)
I put file on desktop, and tried it from the usb drive and it said same error
new computer to me; old computer had 7

 

Hey, could you please provide us with the screenshot of the error message?

 

Also please try this KB as a probable solution.