Like I posted, HP's devs are morons. Dell or Lenovo installers don't behave in the same fashion.Garlin, I was still testing to see if I could get the HP drivers to work "normally" in some way.
The best option was to run the SPxxxx.exe files as admin. In this way, only the file to C:\SWSetup\SPxxxx will be unzipped, but no further execution will be executed. I then have to run the "installdrv.cmd" again in this folder as admin as well, so the drivers are installed (without gui). The file "HPMUP.exe", which would probably be responsible for executing the driver installer, does not work at all.
From this point of view, these problems are probably really due to the HP driver package. No matter what I set with UAC, it still doesn't work (even with untouched win11 iso)
I answered a driver search question on a different site, for another HP laptop. They hardcoded a script check for Windows version 22H2, and so the same script won't install on 23H2. Which is strange since HP claims it's the same driver for both 22H2 & 23H2.
My advice is then extract the drivers yourself, and bypass the installers. There's no magic there, unless you really value the "HP tools".