Hello all. So I have my OS which is windows 10 installed on my Samsung 860 1TB evo ssd. I also have an old WD HDD 320gb which is formatted and nothing on it in my computer that I haven't used in ages. I decided I wanted to remove it so I did. When I try to boot back up I get this "reboot and select proper boot device" message. So I go into my BIOS and make sure my SSD with my OS installed on it is the first in the boot order which it was. But i still kept getting the same message. I so plugged my old HDD back in and windows boots back up normally. What should I do for this? Thanks for any help.