function Remove-SMSvcHostBlankSecurityIdentifiers {
<#
.SYNOPSIS
    Remove blank entries that should have a SID in them
#>
    [CmdletBinding()]
    param ()

    $paths = @(
        "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\SMSvcHost.exe.config"
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\SMSvcHost.exe.config"
    )

    foreach ($path in $paths) {
        $configuration = [xml](Get-Content -Path $path)

        # we only need to remove the ones that are blank
        $nodes = @($configuration.configuration.'system.serviceModel.activation'.'net.tcp'.allowAccounts.add).Where({[string]::IsNullOrWhiteSpace($_.securityIdentifier)})

        foreach ($node in $nodes) {
            # not really anything to show here since they are blank sids
            $node.ParentNode.RemoveChild($node)
        }

        $configuration.Save($path)
    }
}