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#11
The laptop has a internal SATA port and a internal M.2 port.
Drive 0 is on the SATA port.
When I clean installed Windows on the spare drive, I removed the M.2 that was in drive 0 and only had the one SATA drive in the laptop. After the install, I reinstalled the M.2 in drive 0 to transfer all my personal files, email,etc. I was able to boot to either drive via F12.