What motherboard do you have? Vega is not compatible with non-UEFI, non PCI-E 3.0 motherboards in windows 10. You will get an atikmdag.sys BSOD if you install the drivers. Windows 7 doesn't have that issue on these older motherboards but the beta blockchain drivers for windows 7 don't work on these motherboards anyway.
Well then the MainBoard is to old! As i said in the first post it is a Gigabyte GA-G41M-ES2L R-1.4.
You are correct in that I am getting a ATIKMDAG.SYS BSOD!
https://s1.postimg.org/9rvbqbiy1r/22906267_10212393886414886_1325447037_o.jpg
Back to the drawing board in the AM.. I guess I will go dig around at the shop for a newer mainboard.