I don't see how a graphics driver would be involved at this point.
What is the current state of your Hard Drive? Do you just have the one drive, and no mSATA or small SSD?
What message do you get if you boot the Legacy install version?
But to be clear, you can boot the Install Media and go through the process until you get to the Partitions dialog? When you try to create a partition, you get the message?
If Windows 8 is completely gone, you might remove the previous partitions and let the install proceed on the unallocated space.