(2011 MBP) Brightness Control in Windows

[Polytonic]

So I've got this 2011 15" MBP. Brightness control works fine in OSX, and was working out of the box when I installed Windows and all the drivers. On installing a series of Windows updates, brightness control now no longer works, though everything else works fine (alt-tabbing is also a little problematic in some games).

Any suggestions? Thoughts? I'd give more information, but I really have no clue what's going on at this point.

 

[mulo]

reinstall the drivers.

 

[Polytonic]

reinstall the drivers.

That's actually the first thing I did, thinking something went screwy with the keyboard manager. Unfortunately, it also didn't work.