Some hot keys f9 and f10 for Brightness do not work with function key

[Windows 10]

I am using Windows 10 Pro on HP. Some of my laptop's hot keys work with function key but f9 and f10 for Brightness do not work with function key. When i open BIOS system, interestingly, it works there. I have installed and updated drivers, ran scans to diagnose hardware and software issues, troubleshooted keyboard. Nothing worked. What shall I do???????

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