Operating System not found

[katsuku]

Left computer on streaming a music channel on YT. Took a nap and woke up a couple hours later to my computer on a black screen saying No Operating System found.

 

Computer on Windows 10 64bit.

CPU: 4770k

8GB DDR3 memory

1060 6gb Zotac Mini

600W PSU

Motherboard: Gigabyte GA-z87-HD3

Not too sure about bios, it says:
BIOS version F4

BIOS date 5/16/2013

BIOS ID: 8A02AG0H

 

Confirmed boot drive is set as priority in boot order, tried removing the other drives as well.

Was going to give up and just reformat but when I saw it listed in the installation setup page it made me want to try and spend a bit more time to fix it. In the pictures it's listed as Drive 2 partition 2.

Also tried to run the checkdisk command but it says it's unable to run disk checking on this volume because it's write protected.

 

Any suggestions? It seems like my computer just isn't reading the correct partition on the disk maybe but I'm not sure how to get it to do so.

[BlueChinchillaEatingDorito]

Remove all of your drives except for the boot drive just so you don't get confused on which drive has your Windows installation. You could try repairing the EFI bootloader of your boot drive.

 

https://www.dell.com/support/article/ca/en/cadhs1/sln300987/how-to-repair-the-efi-bootloader-on-a-gpt-hdd-for-windows-7-8-81-and-10-on-your-dell-pc?lang=en

 

(The steps apply whether it's a Dell machine or not)

[katsuku]

Thank you! This looks promising but I'm a little confused/concerned with step  as everything but my removable drive with the Windows installer on it is listed as NTSF instead of FAT32 like it implies. Is that what it wants me to select or is something else wrong?