WHMCS Tags system-requirements General errors can occur in many places throughout WHMCS, and can be due to many different problems. However, fixing them is often simple. The first step to using WHMCS is installing it on your server. WHMCS includes an easy browser installation tool to suit most users' needs. When you install WHMCS on a server, make sure to watch for errors both during and after the installation process. Make sure to check for any problems both during and immediately after the upgrade process. If you want more configuration options than browser-based installation offers, you can install and upgrade WHMCS on the command line. For successful installation, updates, and operation, your system must meet the minimum system requirements for your WHMCS version. You can check for updates and apply them directly in the Admin Area using the automatic updater. To prevent problems, we recommend testing updates and customizations in a test environment before applying them to your production server. Use System Health to view your system environment status and quickly find and address issues. Troubleshoot and resolve Unable to connect to the database errors. WHMCS automatically checks for new updates daily. You can also check for updates to WHMCS manually from within the Admin Area. As your database size increases, you may experience slower page loads and other speed-related issues. Optimizing your database and reducing unnecessary data can help WHMCS run faster. Before you update your WHMCS installation, we recommend several preparatory steps.