To day i have formatted one of my host in a test environment and reinstalled.Now im trying to start the vm its giving the error saying seurity id is invalid.

 

Then i used Grant-VMConnectAccess powershell cmdlet to assign a permission/get ownership of the virtual machine.After that I was able to start the vm

 

http://technet.microsoft.com/en-us/library/hh848560.aspx