BIOS / UEFI Error Code
Systems & Devices
BIOS / UEFI
BOOT FAILURE | Insert system disk
Industry
Systems & Devices
Canonical
/systems/bios-uefi/error-codes/boot-failure-insert-system-disk/
Last Updated
Feb 27, 2026
Summary
Firmware could not boot from the current device and is prompting for bootable media.
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What This Code Means
“Boot failure” prompts typically indicate the system didn’t find a bootable OS on the selected device. It often follows changes to boot order, missing drives, or non-bootable disks.
Where Users Usually See This Code
- After drive removal or replacement
- After BIOS reset
Why This Code Appears
- Wrong boot device selected
- Drive not detected
- Missing/corrupted boot files
What Typically Happens Next
- System cannot boot until correct boot device/media is available
What This Code Is Not
- It is not a Windows application error
- It is not a network configuration issue
Troubleshooting Checklist
- □ Confirm the OS drive is installed and detected
- □ Set the correct boot drive in firmware settings
- □ Use recovery media for boot repair if needed
Notes And Edge Cases
External USB drives can accidentally become the first boot device; remove them when troubleshooting.
Related Codes
8 links
- BOOTMGR IS MISSING CodeBoot loader missing
- BOOT DEVICE NOT FOUND CodeBoot device unavailable
- NO BOOTABLE DEVICE CodeBoot device missing
- OPERATING SYSTEM NOT FOUND CodeNo OS detected
- REBOOT AND SELECT PROPER BOOT DEVICE CodeWrong boot device
- DISK BOOT FAILURE CodeBoot device not bootable
- PRESS ANY KEY TO BOOT CodeBooting from external media
- A DISK READ ERROR OCCURRED CodeDisk read failure
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