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.