In some boxes, installation tasks may require more time to finish than the available time set in php. As a result there is the possibility that the execution time will run out and you may get a "Maximum execution time of X seconds exceeded...." error.
This error is relevant to the max_execution_time php setting of your server. You can find more information about this in the following url:
In order to fix the problem just add the following line at the bottom of your settings.php file.
The settings.php file is located under the sites/default/ folder.