Joomla: The installation failed and uninstallation is not possible

If the installation failed there is a known issue with Joomla 2.5 leaving database table rows about the extension behind, making uninstallation, launch and reinstallations impossible.

Solution:

• Launch phpMyAdmin in your server hosting panel

• Go to the table jos_assets

• Search for rows with name ‘com_configbox’ and remove the rows

• Search for rows with name ‘com_cbcheckout’ and remove the rows

• Go to the table jos_extensions

• Search for rows with name ‘com_configbox’ and remove the rows

• Search for rows with name ‘com_cbcheckout’ and remove the rows