Has anyone used this ?
I want to use it but somethings are unclear.
before making a virtual machine it asks you how much of your ram and harddrive do you want it to use, what I'm wondering is the RAM always used or only when you start the virtual pc (or maybe the virtual pc is always on ?)

EDIT : like I have 4 gb ram and if I put 1 gb into the virtual machine will I be left with 3 gb ?