I'm sorry, but could you be a little more specific? I'm not sure how to do that. If it's the one where you set it to "DirectX", for example, or OpenGL, I've done that, with no result.
Whatever file I try to play, VLC plays with reversed colors (negative). All other players (Media Player, MV2Player) play with normal colors. I had ffdshow installed, I thought it somehow changed the colors, deinstalled it, deinstalled VLC as well, then reinstalled it - no luck. Tried deleting cache ...