i have window 10 home 1607 os build 14393.187 64 bit up and running and all drivers and software is updated. i'm visually impaired so i need to adjust the brightness however the brightness bar isn't showing up. i done everything possible to correct, can anyone help please? i done the normal stuff such as uninstall reinstall the AMD Radeon 7700 series graphics video driver and no luck. i really need this badly.