New-HV.ps1

#Requires -RunAsAdministrator 

<#
.Synopsis
   Creates a new Hyper-V instance from a named template.
.DESCRIPTION
   Imports an existing Hyper-V export into a new instance, set-up the local client host/ip resoltution and generate bootstrapping powershell script.
.PARAMETER OSVersion
    The code name for operating system
.PARAMETER VMName
    The name of the new instance
#>
param(
    [Parameter(Mandatory=$true)]
    [string]$OSVersion,
    [Parameter(Mandatory=$true)]
    [string]$VMName
)
$rootPath="C:\Users\Public\Documents\Hyper-V"
$exportPath=Join-Path $rootPath "Exports"

$vmNameToImport="Template-$OSVersion"
$importPath=Join-Path $exportPath $vmNameToImport
$importPath=Join-Path $importPath "Virtual Machines"
$vmcxPathToImport=Get-ChildItem $importPath -Filter "*.vmcx" |Select-Object -ExpandProperty FullName -First 1

if(Get-VM -Name $VMName -ErrorAction SilentlyContinue)
{
    throw "VM with name $VMName already exists"
}

Import-VM -Path $vmcxPathToImport -Copy -GenerateNewId

Rename-VM $vmNameToImport –NewName $VMName
Get-VMHardDiskDrive -VMName $VMName |ForEach-Object {
    $vhd=$_
    $newPath = Join-Path (Split-Path $vhd.Path -Parent) "$vmName.vhdx"
    
    Rename-Item $vhd.Path $newPath
    Set-VMHardDiskDrive -VMName $vhd.VMName -Path $newPath –ControllerType $vhd.ControllerType –ControllerNumber $vhd.ControllerNumber -ControllerLocation $vhd.ControllerLocation
}


$null=Start-VM -Name $VMName

while((Get-VM -Name $VMName).NetworkAdapters.IPAddresses.Count -eq 0)
{

}
$vmIpAddress = (Get-VM -Name $VMName).NetworkAdapters.IPAddresses[0]

Add-HostEntry -Name $VMName -Address $vmIpAddress -Force

$trustedHostsItem=Get-Item WSMan:\localhost\Client\TrustedHosts | Select-Object -ExpandProperty Value
if($trustedHostsItem.Length -gt 0)
{
    $trustedHosts=$trustedHostsItem -split ','
}
else
{
    $trustedHosts=@()
}

if($trustedHosts -notcontains $VMName)
{
    $trustedHosts+=$vmName
    Set-Item WSMan:\localhost\Client\TrustedHosts -Value ($trustedHosts -join ',') -Force
}

$vmAdministratorCredentials=New-HyperVMAdministratorCredential
$vmAdministratorPassword=$vmAdministratorCredentials |Show-Credential |Select-Object -ExpandProperty Password
$netArgs=@(
    "use"
    "\\$vmName"
    "/user:.\$($vmAdministratorCredentials.Username)"
    "$vmAdministratorPassword"
)

Start-Process -FilePath "net" -ArgumentList $netArgs -Wait -NoNewWindow

$initCommands= @(
    "#Set execution policy to unrestricted"
    "Set-ExecutionPolicy -ExecutionPolicy Unrestricted -Force"
    "#Set timezone"
    "Set-TimeZone -Name 'Central European Standard Time'"
    "#Enable the num lock"
    "Set-ItemProperty -Path 'HKCU:\Control Panel\Keyboard' -Name InitialKeyboardIndicators -Value 2"
    "#Enable powershell remoting"
    "Enable-PSRemoting -Force"
    "#Rename the computer"
    "Rename-Computer -NewName $VMName -Force"
    "#Enable file sharing"
    "Get-NetFirewallRule -DisplayGroup 'File and Printer Sharing*'|Enable-NetFirewallRule"
    "#Restart"
    "Restart-Computer -Force"
    "#Finish"
)

$initCmd=$initCommands -join [System.Environment]::NewLine

Write-Host "From withing the Virtual OS, execute the following Powershell script."
Write-Host $initCmd

New-HVTemplate.ps1

#Requires -RunAsAdministrator 

<#
.Synopsis
   Creates a new Hyper-V template.
.DESCRIPTION
   Creates a new Hyper-V instance, drives the OS install, exports the VM and removes the artifacts.
.PARAMETER OSVersion
    The code name for operating system
.PARAMETER MediaPath
    The path to the iso media to drive the operating system installation
#>
param(
    [Parameter(Mandatory=$true)]
    [ValidateSet("2016","2016DE")]
    [string]$OSVersion,
    [Parameter(Mandatory=$true)]
    [string]$MediaPath
)

$vmName = "Template-$OSVersion"
if(Get-VM -Name $vmName -ErrorAction SilentlyContinue)
{
    throw "VM with name $vmName already exists"
}

$rootPath="C:\Users\Public\Documents\Hyper-V"
$vhdPath=Join-Path $rootPath "Virtual Hard Disks\$VMName.vhdx"

$existingVMSwitch=Get-VMSwitch |Where-Object -Property SwitchType -EQ External|Select-Object -First 1
if(-not $existingVMSwitch)
{
    $netAdapterName=Get-NetAdapter |Where-Object -Property Name -Like "Ethernet*"|Select-Object -ExpandProperty Name -First 1
    New-VMSwitch -name "External Virtual Switch" -NetAdapterName $netAdapterName -AllowManagementOS $true
}
$switch=Get-VMSwitch |Where-Object -Property SwitchType -EQ External|Select-Object -ExpandProperty Name -First 1

New-VM -Name $vmName -MemoryStartupBytes 1GB -Generation 2 -NewVHDPath $vhdPath -NewVHDSizeBytes 50GB -SwitchName $switch

Add-VMDvdDrive -VMName $vmName -Path $MediaPath

Start-VM -Name $vmName

Write-Host "Execute windows updates (sconfig 6,A,A) and shutdown the $OSVersion installation on $vmName."
Pause

Stop-VM -Name $vmName -Force

$exportPath=Join-Path $rootPath "Exports"
Export-VM -Name $vmName -Path $exportPath

Get-VMHardDiskDrive -VMName $vmName |ForEach-Object {
    #TODO Needs checking how to delete the hard disk drive
    Remove-Item -Path (Join-Path $_.Path $_.Name) -Force|Out-Null
    #Output object for next pipeline cmdlet
    $_
}|Remove-VMHardDiskDrive
Remove-VM -Name $vmName -Force

Remove-HV.ps1

#Requires -RunAsAdministrator 

<#
.Synopsis
   Remove a Hyper-V instance.
.DESCRIPTION
   Stop the Hyper-V instance and remove the disk and virtual machine
.PARAMETER VMName
    The name of the instance to remove
#>
param(
    [Parameter(Mandatory=$true)]
    [string]$VMName
)
$rootPath="C:\Users\Public\Documents\Hyper-V"

Stop-VM -Name $VMName -Force
Get-VMHardDiskDrive -VMName $VMName |ForEach-Object {
    Remove-Item $_.Path
    $_|Remove-VMHardDiskDrive
}

Remove-VM -Name $VMName -Force

To create a Windows Server 2016 template

New-HVTemplate.ps1 -OSVersion 2016 -MediaPath "14393.0.160715-1616.RS1_RELEASE_SERVER_EVAL_X64FRE_EN-US.ISO"

Then to create an instance

New-HV.ps1 -OSVersion 2016 -VMName "VM201601"

To remove

Remove-HV.ps1 -VMName "VM201601"

New-HV.ps1 depends on cmdlet New-HyperVMAdministratorCredential to acquire the credential required to access this VM. I have such a cmdlet in my profile