Troubleshooting Server and administration related topics You can find detailed information on the following topics in TYPO3 Explained: TYPO3 Creating a TYPO3 backend administrator Reset The Install Tool Password Enabling Debug Mode Caching System Modules Log DB Check Configuration Reports PHP PHP Modules PHP Caches, Extension Classes Opcode cache messages Web server Apache - enable mod_rewrite Apache - adjust ThreadStackSize (Windows) Database MySQL - character sets