I have a computer with 2 drives. It originally had a standard 5600RPM hard drive. A SSD was installed and a fresh copy of windows was installed on top of the SSD.
At this point - I am booting to the new SSD and everything is running fine. I went to take out the old hard drive from the computer and when I did the computer would no longer boot. I connected the old hard drive back in and used the boot menu to select the new SSD. Still nothing boots. I tried selecting the old 5600RPM drive and the computer booted to the "new system" (i.e. my C drive is the SSD and my D drive is the old drive).
I cannot figure out why it is essentially booting the SSD as the main C drive but I am having to select the old drive in the boot menu.