I'm currently not using GPU, only 530. But I saw people with the same error using a GPU.
I have:
i5 6500 3.2GHz
B150M D3H DDR4
HyperX Fury 16GB DDR4 2133
120GB SSD Sandink
So far 530 did very well, as I rode GTA 5 and I edited with premiere on windows 10.
I do not believe the lack of GPU leave these errors and some slow parts in the system. Also because many original MAC's use an Intel HD graphics. Well but still I do not know what happens on my system.
Here is a page to download the program that makes the flash drive bootable for windows:
https://www.microsoft.com/pt-br/software-download/windows10ISO