Choose an OS - two separate volumes on one PC

[relztrah]

I have a M.2 SSD and a traditional magnetic hard drive installed on a PC. The SSD is C: and the HDD is D:. I installed Windows 10 on the M.2 drive and now when I boot I see:



I set it to run automatically on volume 7 assuming it was the Windows on the M.2 drive, which apparently it is. I'm not sure what the volume numbers represent or why I am receiving this message. Is Windows installed in two locations?

 

[xrobwx71]

Open an elevated Command Prompt.

Type diskpart and hit Enter.

Then type list volume and hit Enter.

Upload a screenshot of this.

 

[relztrah]

OK. Here it is.

 

[xrobwx71]

Does it boot if you choose volume 3 in your first post?

 

[relztrah]

No it does not boot when selecting volume 3. Is there a way to safely remove that volume and eliminate the Choose an Operating System message?