I have a Windows 2008 R2 Standard host running Hyper-V with four guests. I ran out of space on my data drive, so I shut down one guest VM and moved the directory containing all the files for that VM to another drive temporarily. I then freed up space on the data drive and moved the VM directory back to its original location. Now when I try to start the VM I get the error:
'Unnamed VM' could not initialize. An attempt to read or udpate the virtual machine configuration failed because access was denied.
Comparing permissions on the directories with a working VM, I found no differences except the presense of a "Virtual Machines" security group present in the working VM's permissions. I cannot find this group in either the local machine or the domain. Can anyone tell me why this is not working and how to find this phantom group?