http://blogs.technet.com/b/enterprise_admin/archive/2009/10/20/detecting-the-virtualization-layer-from-within-a-guest-child-instance.aspxA while back I responded to an internal (Microsoft) e-mail where someone had requested information about how to detect if a Windows OS is running on Hyper-V. It was a pretty good note, and Tony Soper posted it for me on his blog back in August of thisen-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)