Our servers have a RegEdit lock-down in affect. Yes, it is silly. PowerShell can do the job though!
# Get the value of the LSA keys
Get-ItemProperty HKLM:\System\CurrentControlSet\Control\Lsa
# Disable the loopback check
New-ItemProperty HKLM:\System\CurrentControlSet\Control\Lsa -Name “DisableLoopbackCheck” -value “1″ -PropertyType dword
