The Athlon X4 860K and GTX 1050 Ti are perfect together.
As to the BIOS update, do you need one to use the 860K?
How are you trying to update the BIOS? Walk me thru the steps you are taking. And list the BIOS your motherboard has now.
Gigabyte usually offers
3 ways to flash the BIOS. Depending on which board you have, of course. I usually use @BIOS from the Win environment.
But always be sure your PC is 100% stable before you attempt a flash.