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B1InitializeLibrary failed 0xc0000bb

HP Recommended
Hp Touchsmart 520
Microsoft Windows 10 (64-bit)

Yesterday, I started the updat of Windows 10 for the October upgrade. After the process, my PC will not boot and just after starting is stuck, showing the message "B1InitializeLibrary failed 0x0000bb" on a black screen.

After a bit of search on google, I understand it is a BIOS error. How can I reinstall BIOS? On the HP drivers section, I don't see any software for reinstalling or upgrading BIOS. 


Thank you very much for your help.



HP Support Agent
HP Support Agent
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HP Recommended

Thank you for posting on the HP Support Community.


Don't worry as I'll be glad to help, however, to provide an accurate resolution, I need a few more details:

  • Are you able to login into windows desktop?

While you respond to that, let's try these steps:  

BIOS default: 

  1. Turn off the computer and wait five seconds.
  2. Press the Power button to start the computer and repeatedly press the F10 key to enter the BIOS setup menu.
  3. On the BIOS Setup screen, press F9 to select and load the BIOS Setup Default settings.
  4. Press F10 to Save and Exit.
  5. Use the arrow keys to select Yes, then press Enter when asked Exit Saving Changes?
  6. Follow the prompts to restart your computer.

Hope this helps! Keep me posted for further assistance.
Please click “Accept as Solution” if you feel my post solved your issue, it will help others find the solution.

I am an HP Employee

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