Hi All, Thanks for the help. With the certainty of MVMe compatibility, I tried re-cloning the drive (third time), with slightly different partitions. IT WORKED. I am not sure exactly what the issue was, but it is now resolved. Again thanks for all the replies. Regards Derek
Hi All, I have cloned my SK Hynix M.2 boot drive to a Samsung 980pro M.2  Now the All-in-One shows a "Boot Failure on Device" message at Start-Up. Bios Version 1.2.15 CPU i3-8100T Boot Mode is set to UEFI Secure Boot is ON I Changed the SATA operation from RAID to AHCI (This did not help) Boot Options are    1.On Board NIC (IPV4)    2. On Board NIC (IPV6)    3. Windows Boot Manager I can see the Samsung 980 is present in the main tab of the Bios screen If I replace the original M.2 Drive the computer Boots perfectly.  I have tried wiping the Samsung 980 and cloning again with the the same results.  (Cloned using Macrium) Any Suggestions. Thanks Derek
Inspiron 24-5477 Boot Failure on Device