Error Log :- SQL Server Setup failed to execute a command for server configuration. The error was [Microsoft][SQL Native Client][SQL Server]Cannot add functional unit 'sp_sqlagent_get_startup_info' to component 'Agent XPs'. This unit has been already registered with the component.. Refer to the server error logs and Setup logs for detailed error information.
Solution :- Change the correct sytem date (or) you mother board CMOS\BIOS have problem change it