ForceReboot

SQL Server 6.5 includes a ForceReboot entry to complete the system reboot required at the conclusion of the setup program. ForceReboot must be the final entry of the [SCRIPTS] section and accepts an argument of either TRUE or FALSE. TRUE indicates that the server will be automatically rebooted at the conclusion of SQL Server setup.

For example, to run an unattended setup and reboot the server, your initialization file would contain the following entry at the end of the [SCRIPTS] section:

ForceReboot=TRUE
  

For more information, see Microsoft SQL Server Setup and SQL Server Books Online.