Client PC is a Dell Optiplex 3050 with a Seagate 7200RPM SATA HDD and Acronis True Image 2020 (Acronis support costs would apply). Upgrading the system to an Nvme SSD to improve performance of system. BIOS is set to AHCI and secure boot (UEFI). Image was successfully restored from last nights backup onto the Nvme SSD, but bootup fails with Inaccessible boot device. I have run CHKDSK /r already. We have many users on Acronis and using Optiplex 3050, but this is the first time going to an Nvme M.2 drive. We know that system supports the M.2 drive, as we just rebuilt a OP 3050 last week from clean OS using the exact same model SSD.