SQL Server Setup is designed to be as problem-free as possible; however, there may be situations that will interfere with the installation of Microsoft® SQL Server™. The most common errors are simple to diagnose and resolve. The resolution may involve freeing up disk space, shutting down other applications, or restarting the computer to unlock shared files.
To avoid problems, make sure you complete all of the steps in Before Installing: Checklist.
If the installation fails, the Setup program might remove all installed components.
Before running the Setup program or installing additional SQL Server components, be sure to:
Use Services in Control Panel to shut down the MSSQLServer and SQLServerAgent services. Shut down the MSSearch service if you installed Full-text Search. Shut down the MSDTC service if you installed MS DTC.
Any attempt to run SQL Server Setup with the SQL Server Service Manager icon present (or any services still running) may cause setup to fail.
If you cannot remove the read-only attribute on the ODBC* files, SQL Server produces a dialog box that allows you to retry the updating of the ODBC* files.