Hyper-V Program Manager
Another really useful command line option available with Virtual PC is the '-singlepc' option. If you launch a virtual machine from the command line and include this option, the Virtual PC console will not be displayed. This is very useful in enterprise environments where you may not want to have to educate your end user about what a virtual machine is and all that is entailed with that.
By using '-singlepc' you can just have a single icon that directly launches the virtual machine in question - and doesn't expose any other functionality. In fact a number of our users have combined this command line option with our ability to hide the menu and status bars (under the virtual machine settings, in the Display section) to provide a very simple end user experience: