winutil/functions/public/Invoke-WPFOOSU.ps1

function Invoke-WPFOOSU {
    if ($sync.ProcessRunning) {
        Show-WinUtilMessage -Message "Another process is currently running." -Title "WinUtil" -Button "OK" -Icon "Warning"
        return
    }

    $downloadPath = Join-Path $sync.winutildir "ooshutup10.exe"
    $sync.ProcessRunning = $true

    Invoke-WPFRunspace -ParameterList @(,("downloadPath", $downloadPath)) -ScriptBlock {
        param($downloadPath)

        $hasUI = $null -ne $sync.Form -and $null -ne $sync.Form.Dispatcher

        try {
            Write-WinUtilLog -Component "OOSU" -Message "Downloading O&O ShutUp10++."
            if ($hasUI) {
                Set-WinUtilTweaksProgressIndicator -Visible $true -Label "Downloading O&O ShutUp10++ (0%)" -Percent 0
            }

            Save-WinUtilFile -Uri "https://dl5.oo-software.com/files/ooshutup10/OOSU10.exe" -DestinationPath $downloadPath -ProgressCallback {
                param($percent)

                if ($hasUI) {
                    Set-WinUtilTweaksProgressIndicator -Visible $true -Label "Downloading O&O ShutUp10++ ($percent%)" -Percent $percent
                }
            }

            if ($hasUI) {
                Set-WinUtilTweaksProgressIndicator -Visible $true -Label "Launching O&O ShutUp10++" -Percent 100
            }
            Start-Process -FilePath $downloadPath

            Write-WinUtilLog -Component "OOSU" -Message "O&O ShutUp10++ launched."
            if ($hasUI) {
                Set-WinUtilTweaksProgressIndicator -Visible $true -Label "O&O ShutUp10++ launched" -Percent 100
            }
        }
        catch {
            Write-WinUtilLog -Level "ERROR" -Component "OOSU" -Message "O&O ShutUp10++ download failed: $($_.Exception.Message)"
            if ($hasUI) {
                Set-WinUtilTweaksProgressIndicator -Visible $true -Label "O&O ShutUp10++ download failed" -Percent 100
            }
            Write-Error "Couldn't download O&O ShutUp10. Please make sure you have an active Internet connection."
        }
        finally {
            $sync.ProcessRunning = $false
        }
    }
}