Administrator does not have sufficient permissions when running upgrade script
From the steps you've taken, it seems you are trying to do an install on Wordpress.

Have a look at the "Upgrade Troubleshooting" paragraph near the foot of the page at https://wiki.civicrm.org/confluence/display/CRMDOC/Upgrading+CiviCRM+for+Wordpress  The "You do not have sufficient permissions to access this page."  error when trying to run the upgrade script(step 4), probably means that you most likely deactivated CiviCRM plugin during the upgrade process. You just have to visit /wp-admin/plugins.php and activate the plugin, and then proceed with step 4 .

Hope this helps.