Zend Optimizer not installed This file was encoded by the Zend Guard. In order to run it, please install the Zend Optimizer available without charge , version 3. Seeing this message instead of the website you expected? This means that this webserver is not configured correctly. The component "Zend Optimizer" is not installed on the Web Server and therefore cannot service encoded files. Please download and install the Zend Optimizer available without charge on the Web Server.