Windows 10 won't boot after installing new hdd

[TheguysMike]

My build won't boot up properly after installing a brand new hdd. I have my os in my ssd and it worked fine until i installed a new hdd now it keeps saying there is no boot device available. When I go into BIOS and o check on the boot menu it would read my ssd and a windows boot manager I've tried to boot it from the ssd again but again it wasn't reading it and whenever I boot from the boot manager I would get an error saying INACCESSIBLE_BOOTDRIVE. I honestly have no idea what to do on solving this.

My build is:
MOBO: Asus z170-a
Cpu: i7 6700k
Gpu: 2x msi GeForce 960
Ram: Corsair Vengence 2x 4th
PS: Rosehill 700w
Ssd: 120gb Kingston
HDD(new one trying to install): 2tb seagate barracuda

 

[boosted1g]

Make sure in your BIOS hard drive group that your SSD is first in the boot list.

If that does not work then make sure SSD is in the first sata port on your motherbaord (usually SATA 0)

 

[stereovano]

I expect error code is INACCESSIBLE_BOOT_DEVICE and you are getting it on the BSoD (blue screen of death).

If so, then it means that reference to disk C: in HKEY_LOCAL_MACHINE\SYSTEM\MountedDevices registry key is invalid (dangling pointer). It kind of worked when there was no other disks, but when you added second storage device, situation changed: now Windows is unable to find disk C: at boot time, hence the BSoD.

You can fix reference to disk C: in HKEY_LOCAL_MACHINE\SYSTEM\MountedDevices registry key using Emergency Boot Kit:
http://www.prime-expert.com/embootkit/features/fix-boot-problems-and-reassign-drive-letters/