# Identify Administrators users
$users = New-Object -TypeName System.Security.Principal.NTAccount ("Administrators")

# Security Principles for users accessing systems
$SIDofSecureUserGroup = $users.Translate([System.Security.Principal.SecurityIdentifier]).Value

# Secure User Groups found in the Administrators Group
$SecureMachineGroupSDDL = "D:(A;;CC;;; $SIDofSecureUserGroup)"

# Remote Desktop DisplayName for individual rules
$rule = (Get-NetFirewallRule -DisplayName "Remote Desktop*").DisplayName
    foreach ($i in $rule) {
        Set-NetFirewallRule -DisplayName $i -Profile "Private"
    }

# Set Remote Desktop, add Builtin\Administrators groups to the filter
$nfSecurityFilter = Get-NetFirewallRule -DisplayName "Remote Desktop*" | Get-NetFirewallSecurityFilter

# Set NetFirewallSecurity Filter Settings for Authorized Users, login required for local users
Set-NetFirewallSecurityFilter -RemoteMachine $SecureMachineGroupSDDL -InputObject $nfSecurityFilter -Authentication Required -Encryption Required

#This cmdlet can be run using only the pipeline.
foreach ($i in $rule) {
    Get-NetFirewallRule -DisplayName $i | Get-NetFirewallSecurityFilter | Set-NetFirewallSecurityFilter -RemoteMachine $SecureMachineGroupSDDL -Authentication Required -Encryption Required
}

#Looks for Remote Desktop rule, then sends the results to a file on your desktop call fwrules.txt (append)

Get-NetFirewallRule -DisplayName "Remote Desktop*" | out-file $env:USERPROFILE\desktop\fwrules.txt -Append
Get-NetFirewallRule -DisplayName "Remote Desktop*" | Get-NetFirewallSecurityFilter | out-file $env:USERPROFILE\desktop\fwfilter.txt -Append

Also, one thing about Hyper-V, if we apply the same rules to the Hyper-V environment, we can isolate Hyper-V's use to the localsubnet so no-one outside of the network could access those servers. It could be locked down even further using Encryption and Authentication.