How to Remove a Hyper-V Server 2012 R2 from an Orphaned/Non-Existent Domain
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#Check the list of local user accounts:

NET USER


#Reset the local admin password:

NET USER administrator "THE_NEW_PASSWORD"


#Get the details for a specific account

NET USER administrator


#Enable a disabled user account:

NET USER administrator /active:yes


#Create a new user account:

NET USER HV-Admin "THE_PASS" /add


#Remove a Hyper-V Server 2012 R2 from an orphaned domain

NETDOM REMOVE /d:nonexistentdomain.com HyperV-ServerName /FORCE