I've tried too many different things to list, but I'll explain the main ones.
SSD 1 => Windows 8.1 (Primary Boot in BIOS)
SSD 2 => Debian 7.7
GRUB is currently in place as bootloader.
I've attempted many times to delete the partitions/volumes for Debian on SSD 2, and to restore the Windows bootloader via installation disc command prompt or USB repair drive via command prompt.
If I delete the volumes on SSD 2 containing Debian/GRUB, I cannot boot Windows 8.1, and it takes me to a GRUB rescue in which it says the drive could not be found. I can only boot to Windows 8.1 again once I've re-installed Debian/GRUB.
Once I'm in command prompt, I do the following:
bootrec.exe /fixmbr bootrec.exe /fixboot bootrec.exe /scanos bootrec.exe /rebuildbcd (also tried bootrec without .exe, and without the space)
Element not found, and
/scanos returns an incorrect detection of Windows installations. I've used Diskpart to List Partitions and mark the Windows partitions as Active again, which enabled me to use
/rebuildbcd, but they did not actually work in restoring the MBR.
I've read many different guides and Questions/Answers on this, however almost every single one applies to both operating systems being on the same drive. Certain guides even mention it being very different when on separate drives, but do not actually provide a solution for that scenario.
I just want to restore Windows bootloader, and remove Debian/GRUB from SSD 2.