Windows 8, iMac (Mid 2011): Keyboard screen brightness controls do not work. Your solutiondoes not work because the screen brightness control in the charms menu in Windows 8 is greyed out!!
Just installed Windows 8 in Bootcamp on a 15inch MacBook Pro with Retina screen. The F1 & F2 keys to control screen brightness do not work. The Apple Support suggests using the screen brightness in the Windows Charm bar to control the brightness but this is greyed out!! When you hover the cursor over the control, it says Windows unable to control screen brightness!!
Any solutions??
Apart from rebooting into OSX changing the brightness and then reboting back into Windows 8.... thats tiresome!!
MacBook Pro with Retina display, Windows 8, F1 & F2 keys not working