Paisay. I need to call in for my case. The error message I got was that the license have been used on another device. Maybe they tightened down the process in recent times. Or maybe I transferred that license around too many times.
I was experimenting with different build for a while (set up 1 rig, install win10, then tear down that rig and set up a totally new rig and install win10 again and so on).
Maybe the frequency of change exceeded the threshold, so I got this problem.
Lesson learnt is that, do not activate the license until u r doubly sure that is the final rig u want.
Ya...That happens when you transfer the license too many times in a short period of time.