How to fix black screen on Windows 11 with message Your device ran into a problem and needs to restart. We will restart it for you - Stop code: inaccessible boot device ox7b

Question

I've clicked on all of the options on the Troubleshooting menu but nothing works.

I have tried chkdsk and several other command prompts on the black Command Prompts screen on the Troubleshooting menu

bootrec /fixmbrboot

•  bootrec /fixboot
• bootrec /rebuildbcd

bootrec / scanos  

but no got no results.

I've tried to go into Safe Mode by repeatedly pressing F4 while it's starting but nothing happens - I've also tried to access BIOS by pressing F2, F12 or Del - nothing happens with that either.

Answer 1

Hi,

Did you update your computer's BIOS?

If it's a laptop or desktop, if possible, could you provide the laptop model or your desktop configuration?

Can you open the command prompt in recovery mode?

Thanks

Answer 2

The stop code INACCESSIBLE_BOOT_DEVICE (0x7B) means Windows 11 can’t access the system drive during startup. Because startup repair, Safe Mode, and basic bootrec commands haven’t worked, use the more advanced boot and kernel‑phase troubleshooting steps.

Follow these steps in order from Windows Recovery Environment (WinRE):

1. Confirm this is a kernel‑phase boot issue

• The black/blue screen with “Your device ran into a problem and needs to restart” and stop code INACCESSIBLE_BOOT_DEVICE after the logo matches a kernel‑phase startup failure.
• This aligns with the “Kernel phase” symptoms: stop error after splash screen or black screen after splash screen.

2. Try Safe Mode using Advanced Boot Options (not F4 at power‑on) Since F‑keys don’t work, use WinRE:
3. From the “Choose an option” screen, select Troubleshoot > Advanced options > Startup Settings > Restart.
4. When the Startup Settings screen appears, press 4 (or F4) for Safe Mode or 5 (or F5) for Safe Mode with Networking.
5. If Safe Mode works, use Event Viewer to identify the driver or service causing the boot failure:
   • Open Event Viewer.
   • Check System and Application logs for errors around the time of the crashes.
   • Remove or roll back any recently installed drivers, storage controllers, or security software that appear in those errors.

If Safe Mode still fails with the same stop code, continue.

3. Re‑run full BCD repair sequence You already ran some bootrec commands. Use the full BCD repair procedure from advanced boot troubleshooting:
4. In WinRE, go to Troubleshoot > Advanced options > Command Prompt.
5. Run:

      bootrec /scanos
   

   • Restart and test. If still failing, continue.
6. In Command Prompt, run the full BCD rebuild sequence:

      bcdedit /export C:\bcdbackup
      attrib C:\boot\bcd -r -s -h
      ren C:\boot\bcd bcd.old
      bootrec /rebuildbcd
   

7. Restart and check if Windows boots.
8. Repair boot code and boot sector again Still in Command Prompt (WinRE):

bootrec /fixmbr
bootrec /fixboot

• These repair the master boot code and boot sector. Then restart and test.

5. If still stuck: treat as persistent kernel‑phase failure If the system continues to show INACCESSIBLE_BOOT_DEVICE after the above:
6. Try Safe Mode again from Startup Settings (as in step 2). If it works, use Event Viewer to identify failing drivers or services and remove/disable them.
7. If Safe Mode never works, the system drive, its controller, or critical system files are likely too damaged for in‑place repair.
8. Use Windows 11 recovery options If none of the above resolves the issue, use built‑in recovery options from WinRE:
9. From Troubleshoot, choose a recovery option from Recovery options in Windows 11 that best fits the situation, for example:
   • System Restore (if restore points exist) to roll back to a working state.
   • Reset this PC with Keep my files to reinstall Windows while preserving personal files (apps and settings are removed).

These recovery options are the recommended next step when repeated kernel‑phase boot repairs (including BCD and boot sector fixes) do not resolve INACCESSIBLE_BOOT_DEVICE.

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References:

• Advanced troubleshooting for Windows startup issues
• Troubleshooting Windows unexpected restarts and stop code errors