Altering brightness issue on windows 8 lenovo u430
When i use the physical brightness up/down keys, the brightness indicator on the top left pops up but is stuck at one notch from the max. Pressing up and down on the keyboard doesn't change the brightness, just keeps the indiciator there. I tried physically changing it with the mouse, by moving it down on the indicator. It moves down, but doesn't change the brightness of the laptop and the next time i bring the indicator up it's stuck at the same one below max notch. I haven't tried any updates because i'm not sure what category this would fall under. Other than shutting down/restarting i haven't tried any other resolutions.
Anyone have any idea on how to fix this?