He's got a bigger problem if what he claims is true and the Arduino doesn't even show up in Windows 10 Device Manager.
I have a laptop running Windows 10 though not 1709, and I have no problems with IDE 1.8.3 and my Arduino Uno clone.
Choices are:
- bad port on his PC
- bad cable
- bad USB chip on Arduino
Umm, what makes you think I'm lying?? And yes, it's very likely because of my first Arduino purchase being a clone. I'm just going to draw the conclusion that it's either a messed up USB or the clone's USB-to-serial chip being faulty. I will just go and buy an original one and a new USB to be sure.