Turning hyper-v on and offhttp://blogs.technet.com/gmarchetti/archive/2008/12/07/turning-hyper-v-on-and-off.aspxI use hyper-v on my laptop. When I know I don't need VMs for the day, I can squeeze a bit more performance out of the machine by turning hyper-v off with: bcdedit /set hypervisorlaunchtype off and a reboot. To turn it back on: bcdedit /set hypervisorlaunchtypeen-USCommunityServer 2.1 SP1 (Build: 61025.2)