http://blogs.msdn.com/jeff/archive/2008/06/04/hyper-v-error-failed-to-remove-snapshot-when-deleting.aspxInteresting little error I got while attempting to Delete Snapshot Subtree in Hyper-V Manager . I was able to delete every snapshot, but the first one in my tree which would then throw this error message ( 'MySnapshot' unable to remove snapshot ...).enCommunityServer 2.1 SP1 (Build: 61025.2)