I have a PC with an HDD and an NVMe SSD on a PCIe adapter card, both formatted as GPT disks. PC is HP Compaq Elite 8300. Its (old) UEFI BIOS does not recognize that SDD so I cannot just install Windows 10 on it and boot.
While browsing for the solution I saw suggestions saying that it is possible to boot from HDD to the operating system on SSD, but found no suggestions on how to do it.
So I tried to first install Windows 10 on the HDD and then added second Windows install to SSD thinking that I'd be able to boot to it from the ESD partition on HDD. If that succeeded, I would remove the Windows on HDD from the boot menu and erase Windows from it. Unfortunately, when the second installation came to the first reboot of the installation procedure, it booted to a blue screen complaining about missing C:\Windows\System32\winload.efi
I'd be grateful to hear any suggestions and/or for the links to helpful information.
