On set 17 8:55, Vincent DEFERT wrote:
You could try opening the firmware update's executable as an archive
(they are often SFX - self-extracting ZIP archives),
extract its contents to a FAT-formatted USB pen drive,
reboot the laptop with the pen drive attached
and enter the BIOS firmware flash utility (often the F7 key).
This is a good advice, which can be useful for similar cases. As regards
my laptop, the file is
https://ftp.hp.com/pub/softpaq/sp66501-67000/sp66770.exe
(yes, the Compaq BIOS update is distributed by HP, it sounded weird to
me, too).
I tried to extract it with GUI `Ark' on Linux, with CLI `unrar' and by
executing the file itself, after renaming it as `sfx', as suggested
here:
https://unix.stackexchange.com/a/79074
https://unix.stackexchange.com/a/115655
It didn't work, so maybe it's a different format.