The Tableau Server log files, especially the "tabadmin.log" and "tabsvc.log" files When facing startup issues with Tableau Server on a Windows system, the Tableau Server log files, particularly "tabadmin.log" and "tabsvc.log," should be reviewed first. These logs can provide detailed insights into the startup process and highlight any errors or issues that are preventing the server from starting correctly. Option A is incorrect because antivirus logs, while useful for checking interference with program files, are not the primary source for diagnosing startup issues with Tableau Server. Option C is incorrect as SQL Server logs are more relevant for database-related issues and may not provide specific details on Tableau Server startup problems. Option D is incorrect be-cause user access logs generally do not contain information relevant to system startup issues.