Legacy boot is OK, but Secure Boot can't see hard drive

[datapvs]

Boots to OS just fine with "legacy support" enabled. When legacy disabled and secure boot enabled, I get "boot device not found" - install an OS on your hard drive"

All my OS updates are current.

On boot options I see "boot from EFI file" only, no hard drive listed.

I would like to enable "Secure boot".

What is going wrong??

[Lil_Boy_Blue · Accepted solution]

Hi

I don't know.

Secure Boot is enacted by virtue of a Public Key on the Main Board, EG: Microsoft's, and then the BIOS option to use Secure Boot.

Next would be to "Format" the Hard Drive for Secure/GPT booting and not Legacy/MBR booting.

https://www.thewindowsclub.com/convert-mbr-to-gpt-disk

https://www.windowscentral.com/how-convert-mbr-disk-gpt-move-bios-uefi-windows-10

Now I run out of ideas.

[datapvs]

Thanks for verify my worst fears:(

I was beginning to suspect that it had nothing to do with HP itself, but windows not accessing the EFI files.

I'll ponder the URLs you provided.

Thank you !!!

[Lil_Boy_Blue]

Prego.