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ZBOOK 15 G1 brightness FN keys not working

HP Recommended
ZBook G1
Microsoft Windows 10 (64-bit)

Hello everyone,

I have bought a used ZBook G1, did a fresh Windows 10 Pro x64 install (version 20H2) and I cannot make the screen brightness and microphone function keys to work. All the drivers are installed, no unknown devices in the device manager, Windows having all updates as of 30th March 2021. There is no  hotkey package among the drivers, so I have tried numerous sp-packs mentioned around these forums allegedly fixing the issue but nothing seems to be working. I can change brightness via display settings, but that is not very convenient.


Please help


PS: I am willing to reinstall Windows on this machine of necessary

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