[CmdletBinding()]
param ()

begin {
function Test-IsElevated {
$id = [System.Security.Principal.WindowsIdentity]::GetCurrent()
$p = New-Object System.Security.Principal.WindowsPrincipal($id)
$p.IsInRole([System.Security.Principal.WindowsBuiltInRole]::Administrator)
}
}
process {
if (-not (Test-IsElevated)) {
Write-Error -Message "Access Denied. Please run with Administrator privileges."
exit 1
}

$Splat = @{
Path = "HKLM:SOFTWAREPoliciesMicrosoftWindowsWindowsUpdate"
Name = @("TargetReleaseVersion", "TargetReleaseVersionInfo")
ErrorAction = "SilentlyContinue"
}

Remove-ItemProperty @Splat -Force
Remove-ItemProperty -Path "HKLM:SOFTWAREMicrosoftWindowsUpdateUXSettings" -Name "SvOfferDeclined" -Force -ErrorAction SilentlyContinue
$TargetResult = Get-ItemProperty @Splat
$OfferResult = Get-ItemProperty -Path "HKLM:SOFTWAREMicrosoftWindowsUpdateUXSettings" -Name "SvOfferDeclined" -ErrorAction SilentlyContinue
if ($null -ne $TargetResult -or $null -ne $OfferResult) {
Write-Host "Failed to enable Windows 11 Upgrade."
exit 1
}
exit 0
}
end {}