I'm running Windows 8 (64-bit) on a Macbook Pro with Retina display. I'm having trouble with a program and it seems Windows isn't using all of the available RAM. The system recognizes that there is 16GB available but peaks at a maximum of 3GB. Does anyone know how to fix this? ---------- I've tried Windows 7 with the same result. Task manager says I'm using 2.9GB which is the exact same amount it says is in cached memory. The rest is not being used.