int ProcessStartOk333(string path, string name, Boolean start)
            {
                string processName = name;
                var processExists = Process.GetProcesses().Any(p => p.ProcessName == processName);
                var process = Process.GetProcesses().FirstOrDefault(p => p.ProcessName == processName);
                if (!processExists && start == true)
                {
                    string processPath = path;
                    var startInfo = new ProcessStartInfo(processPath)
                    { Verb = "runas" };
                    startInfo.Password = ReadPassword(textBox2.Text); //попытка ввести пароль администратора таким образом
                    startInfo.UserName = textBox3.Text;
                    Process.Start(startInfo); //есть запуск
                                              //  MessageBox.Show("запустили");
                }
            }

 public static SecureString ReadPassword(string password)
        {
            SecureString secPass = new SecureString();
            for (int i = 0; i < password.Length; i++)
                secPass.AppendChar(password[i]);
            return secPass;
        }