Completely remove an existing SQL Server 2005 installation

To completely remove SQL Server 2005 installation from the computer, follow these steps:

1. In Control Panel, open Add or Remove Programs.
2. In the Currently installed programs list, click Microsoft SQL Server 2005, and then click Remove. The SQL Server 2005 Maintenance Wizard starts.
3. On the Component Selection page, under the SQL Server 2005 instances node, select the instance of SQL Server 2005 that you want to remove from the computer.
   
   Note The Remove SQL Server 2005 common components list includes the common components that are used by all instances of SQL Server 2005 on the computer. Only select to remove these common components if you are sure that no other instances on the computer need the components. Remember that common components such as SQL Server 2005 Integration Services, SQL Server 2005 Notification Services, and Client Tools are only installed one time on the same computer, regardless of the number of instances of SQL Server 2005.
4. Click Next, and then complete the wizard.