Resolve Windows 10 related issues for your HP computers or printers by HP Windows 10 Support Center
I have HP PROBOOK 450 G4 the brightness keys are not working when i press to increase the brightness or decrease it doesn't work what can i do ?
install/update your drivers https://support.hp.com/in-en/drivers/selfservice/hp-probook-450-g4-notebook-pc/10477253
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