So I launched the bioshock demo about a week ago and now when I turn my computer on the gamma is all screwed up and I have to start and close bioshock for it to go back to normal. Will uninstalling bioshock fix this?
Yeah, Bioshock did the same thing when I played it - I messed with the IN GAME gamma settings, and the damn game fucked up my GLOBAL gamma settings (visible at 2D desktop as well as other games). I've let the game sit on the pile of rubbish, because a bug like that is unacceptable.
I figure in another 6 months after I upgrade, I'll give the game a fresh try with the latest patch...but until then, I like my gamma settings the way they are. In the meantime, you could try the latest patches.