Hyper V: Event ID 4096

Hi,

Current Hyper -V version:  2008 R2 DC Edition

1. We are planned to upgrade Our Windows server 2008 R2 sp1 DC to Windows server 2012 R2 DC as that time we are failed to upgrade new version.
2. So its back to normal state. We opened the Hyper-V manager console, all the Virtual machine as stated "Saved-Critical– Cannot connect to virtual machine configuration storage"Then we looked into the Event viewer below mentioned error was appear.

"The Virtual Machines configuration 4779633D-906F-4DE1-8BA7-D3EFB1508792 at 'C:\Geeserv40' is no longer accessible: The system cannot find the path specified. (0x80070003)"

Event ID: 4096

Source:    Hyper-V-config

Could you please any one give a solution for that issue because 15 virtual machines are affected in that Hyper-V Manager Console.

Thanks, Ajithkumar.l.