I previously had Windows installed on an SSD. Recently, I upgraded my PC by installing a new NVMe SSD and also installed Windows on it. However, upon booting my PC, the Windows Boot Manager presents me with a choice between the old Windows installation on the SSD and the new installation on the NVMe SSD. The issue arises when I disconnect the old SSD and attempt to boot the PC - instead of loading Windows from the NVMe SSD, it directs me to the boot menu. In the boot priorities listed in the BIOS/UEFI settings, only the Windows Boot Manager is visible, with no option to directly select the NVMe SSD.
I've checked the BIOS/UEFI settings, and the NVMe SSD is recognized. However, in the boot menu order, only the Windows Boot Manager is listed, and there is no option to select the NVMe SSD directly.
Additionally, I'm considering formatting the old SSD since I no longer need it. However, I'm concerned that doing so might affect the boot process for the NVMe SSD. Reinstalling Windows on the NVMe SSD is not an option as it already contains crucial data.