The SCVMM (System Center Virtual Machine Manager) team has released an update to Virtual Machine Manager 2008 beta for Hyper-V RC1. Install this update to enable Virtual Machine Manager 2008 Beta (VMM) to function with Release Candidate 1 (RC1) to the Hyper-V role. After you install this update, you may have to restart your computer. Once you have installed this update, it cannot be removed.
Before You Install the Update: The VMM server and all of the hosts in your environment must be running Hyper-V RC1. After you install the update, you will not be able to add hosts running Hyper-V RC0 to your VMM environment. For information about the Hyper-V RC1 download, see Update for Windows Server 2008 x64 Edition (KB950049).