http://blogs.msdn.com/virtual_pc_guy/archive/2008/09/23/hyper-v-vss-hotfix-available.aspxWe recently released KB956697 for Hyper-V. This hotfix addresses a specific issue that we have identified with VSS support under Hyper-V.  The issue is that if you have any invalid / corrupt / missing virtual machine configuration files - VSS willen-USCommunityServer 2.1 SP1 (Build: 61025.2)