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function system_status($check = FALSE) {
  // Load .install files
  include_once './includes/install.inc';
  drupal_load_updates();

  // Check run-time requirements and status information.
  $requirements = module_invoke_all('requirements', 'runtime');
  usort($requirements, '_system_sort_requirements');

  if ($check) {
    return drupal_requirements_severity($requirements) == REQUIREMENT_ERROR;
  }
  // MySQL import might have set the uid of the anonymous user to autoincrement
  // value. Let's try fixing it. See http://drupal.org/node/204411
  db_query("UPDATE {users} SET uid = uid - uid WHERE name = '' AND pass = '' AND status = 0");

  return theme('status_report', $requirements);
}