If a restored Hyper-V VM is not starting, try re-importing the virtual machine, re-attach the switch, verify file permissions ...
While importing a virtual machine on Hyper-V, if you encounter an error stating ‘Hyper-V encountered an error while loading the virtual machine configuration ...
Adding disk space to virtual machines is important to keep systems running properly and can be accomplished using Microsoft Server Hyper-V with either Hyper-V Manager or Failover Cluster Manager.