validateSysprep.ps1

#This is intended for Win7/Windows Server 2008 R2  sysprep issues with WMF 5.x

$Path ='HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Setup\Sysprep\Generalize'
$acl=Get-Acl -Path $Path
$rights = $acl.Access|?{$_.IdentityReference -eq 'BUILTIN\Administrators'} | Select-Object -ExpandProperty RegistryRights
if($rights -ne 'FullControl')
{
    throw "Please give administrators full control to $Path"
}

if(!(get-command -name 'Get-ItemPropertyValue' -erroraction silentlycontinue))
{
    throw "Please update to PowerShell 5.1 or newer"
}

Get-Item $Path  | Select-Object -ExpandProperty Property | %{
    $name = $_
    $value=Get-ItemPropertyValue -Path $path -Name $Name
    $plugin=($value -split ',')[0]

    if(![System.IO.Path]::IsPathRooted($plugin)){
        $plugin=Join-Path -path "$env:windir\system32" -ChildPath $plugin
    }

    if($plugin -like '*silsysprep.dll')
    {
        # This is my more aggressive fix
        # I've hit other issues with this sysprep provider than the official fix addresses.
        Remove-ItemProperty -Path $Path -Name $Name
        Continue
    }
    
    $exists = Test-Path -Path $plugin
    $message = "$plugin - Exists: $exists"
    if($exists){
        Write-Verbose $message -Verbose
    }
    else
    {
        Write-error $message
    }
}

# This is the official fix
New-ItemProperty -Path "HKLM:\SOFTWARE\Microsoft\Windows\StreamProvider" -Name LastFullPayloadTime -Value 0 -PropertyType DWord -Force