Booting gets stuck for a minute when using Bootcamp on Windows 10 I installed Windows 10 using the official ISO and one of the serials I have with MSDN. When I reboot my Macbook Air 2013 it gets stuck on a black screen for around a minute and then start loading Windows. I only have a windows partition at the moment.

I tried resetting the NVRAM. Didn't help. 

I followed the advice here but that didn't help either since it seems to be for Windows 7 only.
You probably have not blessed the Windows partition. On a Mac, the blessed partition is the one that the firmware will try to boot first.

Open the control panel and select the Boot Camp icon to open the window. Choose to reboot to the Windows partition. This should "bless" the windows partition.