I just checked DXDiag to see if I had DirectX 10 so I could play Shattered Horizon, and noticed this:
My computer came with 4GB of RAM, it said right on the box.
DXDiag says I only have 2044mb (I'm supposed to have ~4000mb).

Is there any way on regaining this rogue RAM I'm missing? Or is it being used for something else?