Upgrading to Drupal 7

To upgrade to Drupal 7
1. First know which version of Drupal you are currently using. For Drupal 6.x go to your Drupal Admin -> Administration -> Reports -> Status report. For Drupal 5.x and before, go to Administer -> Logs -> Status report.
2.check for the latest minor release of your drupal version from Drupal main page. Then download and install it.
3 .Now download and install the latest major version of Drupal until Drupal 7. Do not skip any major version releases.