drupal-captcha

In order to disable the reCaptcha module manually, follow this process

1. Get into the databas and execute this query

UPDATE system SET status = 0 WHERE name = "recaptcha";

2. Clear the cache, if possible with drush

drush cache-clear

3. Clear the cache, through SQL

In order to install the google captcha module follow this procedure

1. Install the CAPTCHA module

2. Install the reCAPTCHA module

3. Enable the reCaptcha module

4. Register your site for reCAPTCHA

5. Get the Site key and Secret key

6. Set the Site key and Secret key at the reCAPTCHA configuration panel