Ok to explain better...
My 250G is my secondary drive. There is nothing but storage on this old drive. I installed Windows onto a new, clean 1TB Samsung F3.
But now, Windows will not load without the secondary drive being connected, and not only that, it must be set as the primary boot drive in the BIOS.
If I set the F3 as the boot drive, it will act as though there's no OS. So I have to restart, set the 250GB as the boot drive, and it will start.
But THEN, when I get into Windows, the 250GB doesn't show up in My Computer. It only shows in Device Manager, and it says it is functioning properly.
What is going on?!