[Kazun]

Код:

$file = Get-Content original.dat -ReadCount 1000
$lines = @($file | Select-String "verison:2.1")

$i = 0
foreach($line in $lines)
{
	$file[$i..($line.LineNumber-1)]+"utf8" | Out-File result.txt -Encoding UTF8 -Append
	$i = $line.LineNumber
}