From BIOS recovery to boot image not authenticated

[Juier]

Hi, I had a CMOS failure earlier this morning, likely because I've ran out of battery last night, after trying to reboot or reset it a few times I've managed to get the following screen:

I've followed the instructions and I alredy have a recovery USB drive, it's a 32GB FAT32, but for some reason I can't get past this screen, if I do as the instructions say (hold Win+B, power on, etc...) I only get to this screen again, I tried both USB ports on my notebook, with and withoud the power cable, the file tree on my USB is as following:
F:.
+---HP
| +---BIOSUpdate
| \---BIOS
| +---Previous
| +---Current
| \---New
+---EFI
| \---HP
| +---BIOSUpdate
| \---BIOS
| +---Previous
| +---Current
| \---New
\---Hewlett-Packard
+---BIOSUpdate
\---BIOS
+---Previous
+---Current
\---New

Most folders have about the same files, but not all, I don't know if I should move those files to the root of the USB or what.

Update: I managed to do it, I had a different revision on the USB drive.

Now I'm back to a previous problem:

"Selected boot image does not Authenticate"

Not sure why... I'm tying to get into BIOS, but without success, my OS is NixOS, so I think I have to disable secure boot, what should I do?

[Juier · Accepted solution]

If anyone ends up here, be sure to check if you downloaded the correct BIOS recovery. The support website isn’t as straightforward as I’d hope, so you might end up in the wrong place. I’m not sure why it asks for my OS version just to give me a BIOS driver.
Once you’ve downloaded the right one, creating the recovery drive is easy. In some cases, you should prefer using a USB 2.0 port. Apparently, some devices won’t read USB 3.0 until after boot.

As for the boot image authentication, it was exactly what I expected: disabling Secure Boot solved it for me. My problem was that I somehow couldn’t access the BIOS options. I believe the system can only handle one key press at a time, so make sure to press them individually.