Antivirus software vendors have updates available to clean the worm from infected systems. Networks with firewalls that guard against intrusion to SQL servers (port 1433) are protected against infection from external systems. Users need to check that their SQL servers don't have blank passwords related to any user account, including the sa account. In addition, Microsoft has an online document that helps users secure their SQL Server installations. Users need to review the document for any relevant configuration settings that might help protect their systems.