I have a strange problem i just cant figure out, Since ive gone to windows 7 ive been having "brightness" issues, when I view a page or even go into a dark area in Warcraft my screens brightness goes a little darker and if i go in well lit places it goes lighter I mean its not standard settings its something that making it go even more lighter or even more darker and its really annoying me, I just want basic lighting settings/ brightness settings, Its not just WoW that this happens, it happens even in Firefox and my desktop and videos and everything, At first i thought it was something like Silverlight but I cant see it in the uninstall list so i dont think i have it, and I just dont know where to start looking...

Im using ATI radeon x2 3850 GPU
Windows 7 84bit
4gb memory
Samsung screen

Thanks in advance on replies.