unicode findstr

$tempResults =  'filelist1.txt' 
Set-Content -Path $tempResults -Value 'Path\Name.Extension, FileSize' -Encoding UTF8

foreach( $file in (Get-ChildItem -File -Path 'C:\path' -Recurse) )
{
    $nameCount = Get-Content -Path $file.FullName -Encoding UTF8 | Select-String -Pattern 'userFindString' | Measure-Object | Select-Object -ExpandProperty Count

    if( $nameCount -gt 0 )
    {
                $line =  $file.DirectoryName + '\' + $file.BaseName + $file.Extension + ' ' + $file.Length + ' ' + $file.CreationTime
        Add-Content -Path $tempResults -Value $line -Encoding UTF8
    }
}
clear 
type $tempResults
#notepad $tempResults
remove-item $tempResults