I just built a second PC using a z170-a board.
I had a spare windows 8.1 pro key so I installed that and used it. Seemed to run fine. Got the 970 drivers installed and all the asus drivers installed. Then I tried upgrading to windows 10. I got error code error 0x80070570 - 0x90002 constantly so I used media creation tool on my main PC (The x99 build in my sig) to create a windows 10 usb for the new PC. Plugged it in and tried to upgrade and it asked for a windows 10 key. Contacted Microsoft support since I obviously didn't have a windows 10 key to use (just the windows 8.1) and while I was chatting the computer blue screened.
It has not booted since. It won't go into safe mode. It tries to "start automatic repair" and then blue screens during it. I even tried to stick a USB 8.1 flash drive and it won't boot from it. It tries to start windows 8.1 setup and then immediately blue screens. I can literally only get into the bios. Nothing else works without blue screening. I can't reinstall the OS or anything. It just blue screens before it gets to any windows installation screens.
Just used a known working stick of ram, the one from my x99 build and it still blue screened.
So so far,
I've reset the CMOS
I've switched the ram sticks around, different slots, different positions, and used one known stick of ram from my x99 build
I've tried booting with one hard drive, one ssd, both, and none plugged in
I've plugged my SSD into my x99 build and completely wiped it and all its partitions
I've tried installing windows 10 and windows 8.1 from a USB stick and later an external optical drive
With nothing plugged into the SATA ports and just the optical drive or USB plugged in I get a blue screen
With either of the two drives plugged into a sata port and the optical drive or usb plugged in I get a blue screen.
I really don't know where to go from here. Is the board bad? The only thing I've been able to do is boot into the bios
When I load from the CDs or USB sticks it says something along the lines of Windows failed to load because the kernel is missing or corrupt. I've used known Windows install CDs that I've used before and have worked.