private void start()
        {
            RegistryKey steamreg = Registry.CurrentUser.OpenSubKey(@"Software\Valve\Steam");
            string steamdir = steamreg.GetValue("SteamPath").ToString();
            string steampath = steamdir + "/steamapps/downloading";
            DirectoryInfo dir = new DirectoryInfo(steampath);
            FileInfo[] files = dir.GetFiles();

            startcheck = true;

                    while (startcheck)
                    {
                        if (files.Length > 0)
                        {
                            label5.Visible = false;
                            label3.Visible = true;
                        }
                        else
                        {
                            label5.Visible = false;
                            label4.Visible = true;

                            DialogResult dialogResult = MessageBox.Show("Warning, shutdown imminent. Continue?", "", MessageBoxButtons.YesNo);

                            if (dialogResult == DialogResult.No)
                            {
                                startcheck = false;
                            }
                            else if (dialogResult == DialogResult.Yes)
                            {
                                ProcessStartInfo shutdown = new ProcessStartInfo("shutdown");
                                shutdown.WindowStyle = ProcessWindowStyle.Hidden;
                                shutdown.Arguments = " -s";
                                Process startcmd = new Process();
                                startcmd.StartInfo = shutdown;
                                startcmd.Start();
                            }
                        }
                        Thread.Sleep(60000);
                    }
        }