Additional info: rereading the mobo manual, I realized I had plugged the HDs into SATA 3 and 4. When the C: drive is connected to SATA 1 and to SATA 2, the machine doesn't even get as far as the BIOS.

There are various reasons why Windows does not start. The first assumption is a defect in the boot environment that prevents the system from starting. However, causes can also be a defective file ...

When I try to access the boot menu, I get a message saying, "The system cannot find any bootable devices." The machine runs (or at least, ran) Windows 10, without any difficulty. The GPU is the only ...

When trying to restore a System Image to a computer, you may receive an error message The system image restore failed due to BIOS/UEFI accompanied by an explanation ...