Did you encounter an issue with VMM 2008 beta when you upgraded to Hyper-V RC1http://blogs.technet.com/m2/archive/2008/05/22/vmm-issues-with-hyper-v-rc1.aspxA lot of you have been experiencing issues when you upgrade Hyper-V to RC1. I would like to reiterate that the VMM team knows about this and we apologize for the inconvenience. See this thread on technet forums for more details. http://forums.microsoft.com/TechNet/ShowPost.aspx?PostID=3373834&SiteID=1en-USCommunityServer 2.1 SP1 (Build: 61025.2)