PowerShell script to extract all ISO images in subfolders with 7zip - see improved batch script below

ExtractISO.ps1

Get-ChildItem $folderPath -recurse | %{

    if($_.Name -match "^*.`.iso$")
    {
        $parent="$(Split-Path $_.FullName -Parent)";
        write-host "Extracting $($_.FullName) to $parent"

        $arguments=@("x", "`"$($_.FullName)`"", "-o`"$($parent)`"");
        $ex = start-process -FilePath "`"C:\Program Files\7-Zip\7z.exe`"" -ArgumentList $arguments -wait -PassThru;

        if( $ex.ExitCode -eq 0)
        {
            write-host "Extraction successful, deleting $($_.FullName)"
            rmdir -Path $_.FullName -Force
        }
    }
}

Recursively pull files out of directories to your current folder and optionally remove the directories.
Get-ChildItem $folderPath -Recurse -File | Move-Item
Get-ChildItem $folderPath -Recurse -Directory | Remove-Item

From StackOverflow

Simple batch script is an improvement

for /R "%~dp0" %%I in ("*.iso") do (
  "C:\Program Files\7-Zip\7z.exe" x -y -xr!"*.rar" -o"%%~dpI" "%%~fI" && del "%%~fI"
)