Yeah its going to be higher in a VM. Look at it this way. Your VM, is allocating processor power from your Main OS to your VM, so just for example, say you have 1ghz as a nice round number. Your VM is using 50% of it. Which is 500mhz. Your VM allocates 100% of that 500mhz from your main OS immediately. So your OS is registering 50% utilization.