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- HP Community
- Notebooks
- Notebook Operating System and Recovery
- unable to update bios to f33

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01-12-2024 04:01 AM
Hello again.
The reason for this failure is because the hidden EFI partition in your laptop is too full, and the HP BIOS update copies the BIOS and and other firmware packages to the EFI partition and in the next boot your laptop starts the update from there.
EFI partition is the boot partition when using UEFI boot - the default for last ~10 years. By default it is only 100MB in size and contains Windows boot files. If your Windows installation is HP preinstalled, then the partition is larger. There may be remnants of earlier BIOS updates eating space; the HP UEFI Diagnostics is also stored there.
The solution:
You can either create a bootable USB drive with the BIOS upgrade softpaq, and boot your laptop with it. You can also delete the \EFI\HP folder from the EFI partition to make room for the BIOS update. The latter carries an additional risk of making Windows inoperable, so I recommend the USB option unless you understand the following instructions to the letter:
Mount the EFI partition with mountvol <drive>: /S in an elevated command prompt. Delete EFI\HP folder. DO NOT delete the EFI folder itself, and DO NOT delete or modify the Boot or Microsoft folders either, they are required for Windows to boot. Unmount the EFI drive with mountvol <drive>: /D and the try the BIOS upgrade again. Should go smoothly now.
After a successful BIOS upgrade you can reinstall the HP UEFI Diagnostics package from its own HP support page.
If you get your BIOS upgrade working - with either option - please accept this as a solution.