TechNet_bLHyper-V is an enterprise IT technology included in Windows Server 2008 and 2008 R2. As such the documentation on TechNet and MSDN is on enterprise IT use, on a server.  However, some may wish to use Hyper-V on a laptop or a desktop computer. Perhaps to learn about Hyper-V, or create training material such as demos, for development purposes, or just for fun. Sometimes, becuase of company IT policy and management practice for servers, running Hyper-V on a laptop is the only way you can develop or document something.

See the full article @ http://social.technet.microsoft.com/wiki/contents/articles/hyper-v-how-to-run-hyper-v-on-a-laptop.aspx.