We have just purchased a new HP desktop 510-p020, Windows 10. The brighness of the display is headache inducing. There are no physical controls on the monitor and nowhere to adjust via the control panel, hardware & sound, display, monitor, etc. No shortcut keys. Per windows, all drivers are current and up-to-date. Starting new job soon and I cannot sit in front of this screen for any length of time currently. Assitance would be appreciated!