GetAllEC2WindowsPassword.ps1

$instances = Get-ec2instance -Filter @(@{name = 'platform'; value = 'windows'})
foreach ($i in $instances){
    $prop = @{   
        Name = $i.Name
        password = Get-EC2PasswordData -InstanceId $i.InstanceId -PemFile "C:\path\to\private\keys\$($i.KeyName).pem"
        InstanceId = $i.instances.InstanceId
    }
    $obj = New-Object -TypeName psobject -Property $prop

    $obj
}