may be only intel 2x0 AMI Firmware(test asrock Z270m pro4 v1.4) this happen when you parttion only single parttion on MBR structure(ms auto will parttion 2 part) then install it,first step done,reboot,windows will not boot again。 this is an MBR error。 MS write wrong MBR entry point。 but ami don't want fix it <solved> my ssd bad write
Z270M? Turn on Win8.1/10 features in UEFI & install Windows 10 in UEFI mode. If you really want 1 partition in Legacy/MBR mode then YOU need to create 1 Primary partition & YOU need to make it active. Nothing to do with Asrock, MS or AMI.
The installer by default marks the partition as active, thus more likely a bad drive. (If you have a spinner, then it's likely a bad HDD PCB or cache on the HDD PCB)