@dave_f1 That's good. I install Android Studio which gives me the latest ADB and fastboot drivers which has resolved many issues, especially like the one you have experienced. I assumed you would have ADB and fastboot drivers installed to get the UT installer working. Your Windows install may have been doing something in the background which stopped the communication between the device and PC.

@totalrando At first, nothing happened because I didn't have the bootloader unlocked. A bit of a pain to figure out at first.

@dave_f1
If I understand correctly you want to train yourself, so I think it is easier for you to create a simple app for starter.

You can check the documentation about clickable and native app development:
http://docs.ubports.com/fr/latest/appdev/index.html