

You may see the same error once your bootable device stopped working. If your connected USB has boot propriety on the chief hard drive, then before loading your computer, this boot process inspects the USB.

You can boot your computer from portable devices like external HDD, USB, and others. If any misconfiguration is observed in BIOS settings, then also boot selection error occurs. In the absence of strong and stable connections, you may come across the boot selection failed error. BCD is the place where lots of data regarding boot settings are stored.

If the BCD - Boot Configuration database is misconfigured, corrupted, or missing it restricts Windows from booting up. Various factors lead to the boot selection failed error. Part 1: What Causes the Boot Selection Failed Error?
