1. At a first glance at the BIOS settings we can see that we may lack the possibility of explicitly stopping Intel RST (rapid storage technology), and we will be presented with at least 2 of the following options: operating storage media in RAID or AHCI mode.

Usually the fix consists in switching from RAID to AHCI mode, although sometimes the opposite option (switching to RAID) will fix the situation, even if only one storage medium is present. An interesting aspect is that this setting can help even if the sata ports are not populated (including the M.2 sata connector).

2. A second solution consists in turning off additional M.2 or Sata type ports that are not populated, even if keeping them in the on state worked until the booting problems appeared.

3. A third probably known solution consists in disconnecting (at least temporarily) all usb devices; including some mouse models can “present” themselves to the BIOS as storage media and thus “disrupt” the boot order, making it impossible to access windows or the desired operating system.

These are just some of the many types of problems that can occur due to incorrect, incomplete or “cheap” programming (BIOS with reduced ROM memory), and their remedy can be achieved by understanding the limits of the ways BIOS/UEFI type firmwares are programmed (among other things).