Website stopped working after installing patch - patch was successfuly installed but getting error - "Fatal error: Class 'Mage_Install_Controller_Router_Install' not found ", any solution???
http://community.magento.com/t5/Version-Upgrades/SUPEE-5994-Built-In-FAIL-for-1-6-x-x/m-p/5974#U5974
The referenced file is failing to be created by the patch because the containing folder Router doesn't exist.
app/code/core/Mage/Install/Controller/Router/Install.php
did your issue get resolved ?