HyperV Annoyance: HyperV hangs at "Loading snapshots for the selected Virtual machine..."

I hit this issue  when I upgraded my Hyper-V from Windows Server 2008R2 to Windows Server 2012. Some of the saved VMs were not starting up and Hyper-V failed to even enumerate the saved states of the VMs.

You can work around this issue as follows:

• Right click on the VM node and select Delete Saved State...
• The Incorrect state would be deleted and the VM would be turned off
• Now Right click and select Start. 

 

This fixed the issue on my setup.