I installed the latest drivers from Bootcamp 5 and all Windows updates.
The brightness keys have no effect on display brightness.
The brightness icon in the lower right corner says "unavailable". Are there any other solutions to this problem?
MacBook Air, OS X Mountain Lion (10.8.3)
Take it to the Genius Bar. You might have an issue with you SIM. The SIM is what manages power in the unit and will get confused on how much power to send to certain parts. It should take about 10 minutes for them to re-program the part by plugging in a special cable and restarting the Mac. What model do you have? Cuz from what I have noticed, issue with the SIM has occured in the Macbook models.
Windows 8, MacBook Air (2010 3,2) Keyboard screen brightness controls do not work
