Question “Reboot and select proper Boot device” after installing Windows 10

[bartonpida]

I have a custom-built gaming PC and have installed Windows 10 on many different SSDs over the years, but have never run into this issue. I used the media creation tool on my laptop to install windows setup onto a bootable USB drive. I then plug said USB drive into my PC which only has one empty nvme m.2 ssd installed. I go through the windows setup process as normal and install Windows onto my m.2 SSD. As soon as the installation finishes and the PC is about to restart, I unplug the USB drive with the windows installation media on it (If I leave it plugged in, the PC boots back to the beginning of the windows 10 setup process, causing an infinite loop). Upon rebooting, I am met with a black screen that says “Reboot and select proper Boot device.” I restart my computer and enter the bios to ensure that the SSD with windows installed on it is the boot priority, which it is. I then make sure that CSM is disabled, fast boot is disabled, and SATA mode is set to AHCI. I have tried everything but can’t get past the part during the windows installation process where the computer restarts. I have looked through countless threads like these and articles to no avail, but hoping someone can help me out. I’m also 100% sure that the m.2 SSD and the USB drive I’m using are not defective or installed improperly. I have even tried using a separate m.2 SSD and a separate USB drive and the issue persists.
Edit: I fixed the issue by switching my SSD to a separate m.2 socket on my motherboard.

 

[SkyNetRising]

Boot from windows installation media into command prompt,
execute following commands ans show screenshot
(upload to imgur.com and post link)

diskpart​

list disk​

select disk 0​

list partition​

list volume​

​

Note. If you installed windows in legacy mode, and disabled CSM after that, then you can not boot into windows anymore.

 

[bartonpida]

Boot from windows installation media into command prompt,
execute following commands ans show screenshot
(upload to imgur.com and post link)

diskpart​

list disk​

select disk 0​

list partition​

list volume​

​

Note. If you installed windows in legacy mode, and disabled CSM after that, then you can not boot into windows anymore.

I appreciate your swift reply but thankfully I fixed the issue by switching my SSD to a separate m.2 slot on my motherboard. It appears that only one of the sockets on my board is actually bootable.

 

[SkyNetRising]

It appears that only one of the sockets on my board is actually bootable.

That is highly unlikely.