Prevent Windows 11 Upgrade

<#
.SYNOPSIS
    This Test script checks to see if the listed registry values are present
.DESCRIPTION
    This script queries the registry for the required values to prevent
    Windows 11 from installing.
.Notes
    File Name       :Prevent_w11_Eval.ps1
    Original Author :TJ Coppola
    Prerequisite    :PowerShell V2 over win7 and upper
#>

#define variables
$path = "HKLM:\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate"
$wu = Get-ItemProperty -Path $path

#check keys
if($wu.ProductVersion -match "Windows 10" -and $wu.TargetReleaseVersion -eq 1 -and $wu.TargetReleaseVersionInfo -match "21H2"){exit 0}
else{exit 1}

<#
.SYNOPSIS
    This script creates registry values to prevent Windows 11 from
    installing. 
.DESCRIPTION
    This script queries the registry for the required values to prevent
    Windows 11 from installing then creates them if they are not 
    present.
.Notes
    File Name       :Prevent_w11.ps1
    Original Author :TJ Coppola
    Prerequisite    :PowerShell V2 over win7 and upper
#>

#Handle Exit codes:
trap {$host.ui.WriteErrorLine($_.Exception); exit 90 }

#define variables
$path = "HKLM:\SOFTWARE\Policies\Microsoft\Windows\"
$key = "WindowsUpdate"
$wu = Get-ItemProperty -Path $path$key

#create key
if(-not (Test-Path $path$key)){New-Item -Path $path -Name $key}
else{write-host $path$key "already exists."}

#create properties
Try{
    if(-not $wu.ProductVersion -match "Windows 10"){New-ItemProperty -Path $path -Name "ProductVersion" -Value "Windows 10"}
    else{write-host "Property" $wu.Productversion "already exists."}

    if(-not $wu.TargetReleaseVersion -eq 1){New-ItemProperty -Path $path -Name "TargetReleaseVersion" -Value 1}
    else{write-host "Property" $wu.TargetReleaseVersion "already exists."}

    if(-not $wu.TargetReleaseVersionInfo -match "21H2"){New-ItemProperty -Path $path -Name "TargetReleaseVersionInfo" -Value "21H2"}
    else{write-host "Property" $wu.TargetReleaseVersionInfo "already exists."}
    }
Catch{exit 1}