Screen brightness keys not working after 5.0 update on Windows 8.

I believe the drivers for the screen aren't working since changing the brightness manually in windows isn't working either. There is also an error with the intel hd 4000 graphics, if that has anything to do with it. This problem did not occur before I downloaded the new drivers for windows 8.

Same thing is happening to me as well, just posted about it 30 seconds ago. PLEASE HELP

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