I also had to call support to activate Windows on a Surface 3. In total I spoke to 6 Microsoft representatives and only 2 had any idea what I was talking about.

I also had to call support to activate Windows on a Surface 3. In total I spoke to 6 Microsoft representatives and only 2 had any idea what I was talking about. I was asked to reboot the computer and go to the BIOS by one of the reps. I was also told that the licence I had was an OEM one so I would have to contact the manufacturer (yes this was from MS licence activation support)