$fonts = (New-Object -ComObject Shell.Application).Namespace(0x14)
dir *.ttf | %{
    if (test-path "C:\windows\fonts\$($_.name)") {
        Write-Host $_.name " Font already installed\n"
    } else {
        $fonts.CopyHere($_.fullname)
    Write-Host $_.name " font installed\n"
    }

}