1] Check the boot sequence and boot mode This is one of the important solutions to fix this Default Boot Device Missing or Boot Failed problem on your Windows 11/10 system.

Raspberry Pi won't boot? New Raspberry Pi 5 not booting? Try these Raspberry Pi troubleshooting tips.

Read: Fix Automatic Startup Repair not working 2] Verify the boot order If you are using a dual boot system on your computer, it is highly recommended to verify the boot order.