KB2964439 – Hyper-V VM Backup Leaves The VM In Locked State ...
aidanfinn.comOct 08, 2014 · You start a backup job in DPM to back up Hyper-V virtual machines (VMs). In this scenario, DPM sometimes leaves the VM stuck in the backup state (locked). A supported hotfix is available from Microsoft Support. To apply this update, you must first install update 2919355 in Windows 8.1 or Windows Server 2012 R2.