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f2 and f2 brightness keys are not working, but I can adjust my brightness in settings

HP Recommended
Hp probook 440 g7
Microsoft Windows 10 (64-bit)

My f2 and f3 brightness keys aren't suddenly working, i'm very sure that my f2 and f3 keys are working because I tried them out in chrome using fn+f3 and it worked, it's just the brightness keys won't work. Take note, I can still adjust my brightness in settings display, it's just the f2 and f3 keys for brightness are not working. I was just installing NOX, it is an emulator app, and as I have installed NOX, i also uninstalled the HP client security manager for my NOX to work, then as far as I know, the f2 and f3 keys are not working. I already tried to re-install the drivers but it's still not working. Can you help me with this pls? Thank you very much!

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