Win2012R2 environment, the Hyper - V appeared yesterday: virtual machine cannot be closed and submitted to the following error: all the right-click menu of the virtual machine at the same time a lot less command, figure: 2
The current open virtual machine can be used, but a closed but were unable to start, the same mistake, who know how to solve??? Thank you very much!

"Try to change... The state of the application encounters an error, XXXX cannot change state, when the object is in a state of its was unable to do this, "