Qubes 4.2 installation not working when SSD is moved to another identical PC

[apparatus]

If you’ve installed Qubes OS with UEFI then check this:

Boot device not recognized / troubleshooting instructions question

Did you try to mount /dev/nvme0n1p1? Is it empty? If it’s not empty then you can try to add EFI boot menu entry using this command in Ubuntu or in Qubes OS installer shell: efibootmgr -v -c -u -L "Qubes OS" -l /EFI/qubes/grubx64.efi -d /dev/nvme0n1 -p 1 If it won’t work then you can try this: