How do I reset the number of failed login attempts?
Drupal 7 prevents brute force attacks on accounts. It does so by refusing login attempts when more than 5 attempts failed. The amount of failed logins is recorded in the table 'flood'.

You can either wait before trying to login again, or clean the flood table following one of the procedures below:


Manually delete all of (or the last applicable) rows in 'flood' table.
Execute the following query on the Drupal database. To execute this query it will be necessary to login to the database. This is typically done through the command line or through a GUI interface such as phpMyAdmin.

DELETE FROM `flood`;

From the command line, with drush installed, execute the following command:

drush php-eval 'db_query("DELETE FROM `flood`");'