hw_id_from_file = fileread("hw_id.txt");
hw_id_from_file = md5(hw_id);

if (hw_id_from_file == HW_ID()) {
 a program működik!
}
else {
 write("Írd be a serialt!");
 serial = read();
 serial = md5(serial);
 sendToServer(serial, HW_ID);

 response = getServerResponse();
 if (response == MAX_COMPUTER_NUMBER_REACHED) {
  write("Nincs több géped, amire felteheted!");
  return;
 }
 if (response == WRONG_SERIAL) {
  write("Rossz serial kód!");
  return;
 }
 if (response == SUCCESS) {
  filewrite("hw_id.txt", HW_ID());
  a program működik!
 }
}