plain add to domain script

$dir = "c:\sysprep"
$username = “<Domain>\<UserName>"
$password = ConvertTo-SecureString “<password>” -AsPlainText -Force
$myCred = New-Object System.Management.Automation.PSCredential $username, $password

Add-Computer -DomainName <Domain.org> -OUPath "OU=Win7 Computers,OU=Domain,DC=Domain,DC=org" -Credential $mycred -ErrorAction Inquire -PassThru

Remove-Item $dir\* -recurse
Set ExecutionPolicy Restricted -Force
Write-host ***************************Rebooting***************************
Restart-Computer -ComputerName localhost