the disks are mbr + ntfs none are gpt formatted, the system does not start with that type of formatting.
I should therefore reformat a disk in gpt, and then prepare a windows installation stick in gpt format. Before installing everything the ports should be set in ahci.
To convert the disk I can use EaseUS Partition Manager, without any data loss, so I wouldn’t even need to reinstall windows.
Do please read careful the guide, when decided to migrate the system to NVMe boot.
I am going to read it again. There’s probably some part I didn’t understand.
thanks