ACER Nitro AN517-42 Adding a second M.2 SSD my laptop wouldn't boot.

I have a new ACER Nitro AN517-42 and it came with a WD 500GB WD M.2. I wanted to add a second SSD and I had a spare M.2 SSD 1TB which I installed with no problem. I booted immediately in BIOS, checked to see if the computer recognized the new drive. Yes it did. I then saved the BIOS (F-10) and exited. 3 days later my laptop wouldn't boot. I'd turn it on and the Acer logo appeared and it stopped there - it would not boot into windows. Then I decided to boot directly into the BIOS once again to see if anything had changed. Both drives were recognized. I exited the BIOS and boom, Windows booted. However, from a cold start Windows would not boot until I went back into the BIOS 1st, then exited and then windows would boot. Did I miss something? Is there a MB DIP switch I need to flip? I can't figure this out.

[Edited the thread to add model name to the title and to add issue detail]

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Emma_

Hello!!

@jimrx4

https://community.acer.com/en/discussion/682271/adding-a-second-m-2-ssd

Hi, remove the SSD and boot to Windows and follow the instruction below:

Clck the Start Button and type cmd
Right-click the result and select Run as administrator
Type this command and press ENTER: bcdedit /set {current} safeboot minimal
Restart the computer and enter BIOS Setup by tapping on F2
Change the SATA Operation mode from RST to AHCI (press crtl+s on the main tab if the option is not visible)
Save changes and exit Setup and Windows will automatically boot to Safe Mode.
Right-click the Windows Start Menu once more. Choose Command Prompt (Admin).
Type this command and press ENTER: bcdedit /deletevalue {current} safeboot (ALT: bcdedit /deletevalue safeboot)
Reboot once more and Windows will automatically start with AHCI drivers enabled.
Shut down and Install the SSD