Maximized Windows On Second Screen Shows Edges On First Screen.

My video card died a few days ago so i had to start using my integrated Intel HD Graphics.
i have once screen at 1920X1080 and the other is 1680x1050 and when ever i maximize a window (firefox for example) it overlaps on my 1st screen.
imgur: the simple image sharer
is a image of both screen and you can see the window layered onto the start of my screen under the start menu orb.

I have the same problem on ours here, I believe we're using a discrete graphics card with win7. Its really annoying, he uses AutoCAD fullscreen on the big monitor, but the edge of the program window shows on the first screen ~3-5 pixels. It appears to only happen to AutoCAD on this computer. Very annoying.

I'll post if I find a solution, I think I've fixed this once before.