gigabyte z370 aorus gaming k3
cpu: i5 8600k
windows 10 pro 64 bit
Also, have you tried the driver from your system manufacturer's website? yes
Well, if the driver from the gigabyte site is producing these problems, I would go back to gigabyte and ask why. They are your first line of defense. There may be some hardware issue that they are aware of, or perhaps you need the latest version of their bios.
That said, this is your processor:
You have Intel UHD Graphics 630
The latest driver is here:
If this does not work, and gigabyte is of no help, please wait for one of the Intel support staff to respond.